WO2025015702A1 - 电池的注液安全装置、注液方法和注液系统 - Google Patents

电池的注液安全装置、注液方法和注液系统 Download PDF

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Publication number
WO2025015702A1
WO2025015702A1 PCT/CN2023/120218 CN2023120218W WO2025015702A1 WO 2025015702 A1 WO2025015702 A1 WO 2025015702A1 CN 2023120218 W CN2023120218 W CN 2023120218W WO 2025015702 A1 WO2025015702 A1 WO 2025015702A1
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WO
WIPO (PCT)
Prior art keywords
battery
liquid injection
injection
safety device
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/CN2023/120218
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English (en)
French (fr)
Inventor
吴凯
孙陈铭
冯亚兰
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Contemporary Amperex Technology Co Ltd
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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
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Publication of WO2025015702A1 publication Critical patent/WO2025015702A1/zh
Anticipated expiration legal-status Critical
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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
    • H01M50/673—Containers for storing liquids; Delivery conduits therefor
    • 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
    • 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 liquid injection safety device, a liquid injection method, and a liquid 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 liquid injection safety device, a liquid injection method and a liquid injection system, which can improve the manufacturing performance of the battery during the liquid injection process.
  • a battery injection safety device which is applied to a battery having an injection port, and the injection safety device comprises: an injection member channel, the injection member channel is arranged corresponding to the injection port of the battery, and the injection member channel is used to pass the injection member so that the injection member passes through the injection port of the battery to the battery.
  • the inside of the cell is filled with electrolyte.
  • the liquid injection piece is used to inject liquid inside the battery, which can reduce the problem of electrolyte contamination caused by electrolyte leakage during the injection process. Furthermore, the battery is protected by the liquid injection safety device during the injection process, and the liquid injection piece can pass through the liquid injection port of the battery more accurately through the liquid injection piece channel set in the liquid injection safety device, reducing the possibility of the liquid injection piece deviation affecting the battery, thereby improving the manufacturing performance of the battery during the injection process and the reliability of the battery.
  • the liquid filling safety device includes a liquid filling safety cap, and the liquid filling safety cap is configured to be buckled 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 part can enter the interior of the battery through the liquid injection safety cap more accurately, 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 guide groove is designed as a conical guide groove, so that the first inclined guide groove can have 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 the battery during the injection 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 liquid filling safety cap to buckle onto the battery.
  • the second inclined guide groove can expand the injection safety
  • the inner diameter of the cap allows 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 production efficiency of the battery 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 liquid injection safety device is disposed corresponding to the wall where the electrode terminal of the battery is located, and a receiving groove for receiving the electrode terminal is formed in the liquid injection safety device.
  • the receiving groove in the liquid injection safety device can provide good protection for the electrode terminal, and can also enable the liquid injection safety device to be accurately aligned with the battery, thereby improving the correspondence between the liquid injection channel in the liquid injection safety device and the liquid injection port in the battery, so as to further improve the manufacturing performance of the battery during the liquid injection process.
  • the shape of the receiving groove matches the shape of the electrode terminal.
  • 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 and the battery.
  • the gap between the first receiving groove and the electrode terminal is small, and the first receiving groove can play a good protective role on the electrode terminal, thereby reducing the interference and influence of the external environment on the electrode terminal during the liquid injection process.
  • an air guide groove is provided in the liquid filling safety device, and the air guide groove is connected to a first surface of the liquid filling safety device attached to the battery and a surface of the liquid filling safety device facing the external environment.
  • the air guide groove can introduce atmospheric gas in the external environment into the gap between the first surface of the liquid injection safety device and the battery, thereby increasing the pressure between the liquid injection safety device and the battery, facilitating the separation of the liquid injection safety device from the battery, and thereby improving the production efficiency of the battery.
  • the air guide groove is connected to the first surface and a second surface of the liquid injection safety device opposite to the first surface.
  • the air guide groove is designed to connect the first surface and the second surface which are opposite to each other, so that the manufacture of the air guide groove in the liquid injection safety device can be facilitated and the overall manufacturing cost of the liquid injection safety device can be reduced.
  • a sealing member is provided at the injection port of the battery, and the injection member channel is provided corresponding to the sealing member, and the injection member channel is used for passing the injection member so that the injection member passes through the sealing member and injects electrolyte into the interior of the battery.
  • a sealing member is provided at the filling port of the battery.
  • the filling member is used to pass through the sealing member to enter the interior of the battery for filling, which can further reduce the electrolyte contamination problem caused by electrolyte leakage during the filling process and improve the manufacturing performance of the battery during the filling process and the reliability of the battery.
  • the length L1 of the injection piece channel and the length L2 of the target segment in the injection piece satisfy: L1 ⁇ 2 ⁇ L2, wherein the target segment is located at one end of the injection piece facing the inside of the battery and outside the injection piece channel.
  • the injection piece channel can play a better restraining role on the injection piece, reduce the overall skewness of the injection piece, so that the injection piece can enter the injection port of the battery at a better angle to reduce the interference and influence of the injection piece on the structural parts of the injection port.
  • the injection piece can pass through the seal at a better angle, so that the injection piece can effectively and quickly pass through the seal to enter the interior of the battery.
  • the diameter D1 of the injection piece and the diameter D2 of the injection piece channel satisfy: 0 ⁇ (D2-D1)/D1 ⁇ 0.15.
  • the overall skewness of the injection piece can also be reduced, so that the injection piece can enter the injection port of the battery at a better angle to reduce the interference and impact of the injection piece on the structural parts of the injection port.
  • 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.
  • a battery injection method comprising: providing an injection safety device on the battery, wherein an injection member channel corresponding to an injection port of the battery is formed in the injection safety device; moving an injection member in the injection member channel so that the injection member enters the interior of the battery through the injection member channel and the injection port; and injecting electrolyte into the interior of the battery through the injection member.
  • the liquid injection method before the liquid injection safety device is provided on the battery, the liquid injection method further includes: providing a sealing member at the liquid injection port of the battery; the above-mentioned moving the liquid injection member in the liquid injection member channel so that the liquid injection member enters the interior of the battery through the liquid injection member channel and the liquid injection port, including: moving the liquid injection member in the liquid injection member channel so that the liquid injection member enters the interior of the battery through the liquid injection member channel and the sealing member.
  • a battery injection system comprising: an injection piece and an injection safety device according to the first aspect or any possible implementation manner of the first aspect, wherein the injection safety device is configured to be disposed on the battery, and the injection piece is used to inject electrolyte into the battery through the injection safety device.
  • the liquid injection piece is used to inject liquid inside the battery, which can reduce the problem of electrolyte contamination caused by electrolyte leakage during the injection process. Furthermore, the battery is protected by the liquid injection safety device during the injection process, and the liquid injection piece can pass through the liquid injection port of the battery more accurately through the liquid injection piece channel set in the liquid injection safety device, reducing the possibility of the liquid injection piece deviation affecting the battery, thereby 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 three-dimensional diagram of a battery liquid injection safety device and a battery in cooperation with each other provided in one embodiment of the present application;
  • FIG3 is a schematic cross-sectional view of the liquid injection safety device and the battery shown in FIG2 along the A-A' direction;
  • FIG4 is another schematic three-dimensional diagram of the cooperation between the battery liquid injection safety device and the battery provided in one embodiment of the present application.
  • FIG5 is a schematic cross-sectional view of a liquid injection safety device provided in one embodiment of the present application.
  • FIG6 is a schematic perspective view of the liquid injection safety device shown in FIG5 ;
  • FIG7 is another schematic three-dimensional diagram of the cooperation between the battery liquid injection safety device and the battery provided in one embodiment of the present application.
  • FIG8 is another schematic cross-sectional view of a liquid injection safety device provided in one embodiment of the present application.
  • FIG9 is a schematic flowchart of a battery injection method provided in an embodiment of the present application.
  • FIG. 10 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-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, Or magnesium ion battery, etc., the embodiments of the present application are not limited to this.
  • 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 case for encapsulating one or more batteries. The case can reduce the effect of liquid 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.
  • injection parts such as injection needles and injection tubes can be used as injection tools.
  • the injection parts are inserted into the injection port of the battery to enter the interior of the battery.
  • the injection device can directly inject the electrolyte into the interior of the battery through the injection parts to reduce the possibility of electrolyte leakage to the outside of the battery.
  • the injection parts may be misaligned and may not be inserted into the battery.
  • Other parts except the injection port, such as piercing into the electrode terminals of the battery have a certain impact on the manufacturing performance and subsequent use performance of the battery.
  • an embodiment of the present application provides a battery injection safety device, which is applied to a battery with an injection port, and the injection safety device includes: an injection piece channel, which is arranged corresponding to the injection port of the battery, and the injection piece channel is used to pass the injection piece, so that the injection piece passes through the injection port of the battery to inject electrolyte into the interior of the battery.
  • the injection piece is used to inject liquid into the interior of the battery, which can reduce the problem of electrolyte contamination caused by electrolyte leakage during the injection process.
  • the injection safety device is used to protect the battery during the injection process, and the injection piece can pass through the injection port of the battery more accurately through the injection piece channel arranged in the injection safety device, reducing the possibility of the injection piece deviation affecting the battery, thereby improving the manufacturing performance of the battery during the injection process and the reliability of the battery.
  • 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, the negative terminal cover 1301 and the positive terminal cover 1302 cover the opening of the shell 110 from both ends of the shell 110 respectively, so as to cover the electrode assembly 120 in the shell 110.
  • the negative terminal cover 1301 is provided with a negative electrode terminal
  • the positive terminal cover 1302 is provided with a positive electrode terminal.
  • the electrode assembly 120 is provided with a pole ear 121, 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 cap 1301 or the positive terminal cap 1302 is also provided with a liquid injection port 1312.
  • the central portion of the negative terminal cap 1301 may be provided with a liquid injection port 1312.
  • an external liquid injection tool may be provided at the liquid injection port 1312 to inject electrolyte into the battery 100.
  • 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 is a schematic three-dimensional diagram showing the cooperation between a battery injection safety device 200 and a battery 100 provided in an embodiment of the present application.
  • Fig. 3 is a schematic cross-sectional diagram of the injection safety device 200 and the battery 100 shown in Fig. 2 along the A-A' direction.
  • the liquid injection safety device 200 is applied to a battery 100 having a liquid injection port 1312.
  • the liquid injection safety device 200 includes: an injection member channel 210, which is arranged corresponding to the liquid injection port 1312 of the battery 100, and the injection member channel 210 is used to pass the injection member 300 so that the injection member 300 passes through the liquid injection port 1312 of the battery 100 to inject electrolyte into the interior of the battery 100.
  • 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 battery 100 may be provided with a liquid injection safety device 200, in which a liquid injection passage 210 is formed.
  • the liquid injection safety device 200 Before injecting liquid, the liquid injection safety device 200 may be arranged on the wall where the liquid injection port 1312 of the battery 100 is located, and the liquid injection member channel 210 in the liquid injection safety device 200 may correspond to the liquid injection port 1312. Then, the liquid injection member 300 is passed through the liquid injection member channel 210 (for example, the liquid injection needle is inserted into the liquid injection needle channel), and the liquid injection member 300 can reach the liquid injection port 1312 of the battery 100 through the liquid injection member channel 210, and the liquid injection member 300 can then enter the interior of the battery 100 through the liquid injection port 1312 to inject liquid into the interior of the battery 100.
  • the liquid injection port 1312 of the battery 100 may be disposed on the top wall of the battery 100, and the liquid injection safety device 200 may be correspondingly disposed above the battery 100, for example, disposed on the top wall of the battery 100.
  • the liquid injection member 300 may be disposed coaxially with the liquid injection member channel 210 in the liquid injection safety device 200. The liquid injection member 300 may move in a vertical direction, and vertically enter the liquid injection port 1312 of the battery 100 after passing through the liquid injection member channel 210.
  • the length of the injection member channel 210 in the injection safety device 200 needs to be less than the overall length of the injection member 300, so that the injection member 300 can pass through the injection member channel 210 to enter the interior of the battery 100.
  • the diameter of the injection member channel 210 also needs to match the diameter of the injection member 300, for example, slightly larger than the diameter of the injection member 300, so that the injection member 300 can smoothly pass through the injection member channel 210 without jamming, and the injection member 300 has a better correspondence with the injection port 1312 of the battery 100.
  • the liquid injection piece 300 is used to inject liquid inside the battery 100, which can reduce the electrolyte contamination problem caused by electrolyte leakage during the injection process. Furthermore, the liquid injection safety device 200 is used to protect the battery 100 during the injection process, and the liquid injection piece 300 can pass through the injection port of the battery 100 more accurately through the liquid injection piece channel 210 set in the liquid injection safety device 200, reducing the possibility of the displacement of the liquid injection piece 300 affecting the battery 100, thereby improving the manufacturing performance of the battery 100 during the injection process and the reliability of the battery 100.
  • FIG. 4 shows another schematic structural diagram of the liquid injection safety device 200 and the battery 100 provided in an embodiment of the present application cooperating with each other.
  • the liquid filling safety device 200 may include a liquid filling safety cap, which is configured to be buckled onto the battery 100 .
  • the liquid injection safety cap may include a cover body and an annular wall.
  • 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 in the battery 100 is located, so that the liquid injection member 300 can vertically pass through the liquid injection port 1312 to accurately enter the interior of the battery 100 for liquid injection.
  • the liquid injection member channel 210 may also be correspondingly formed at the center of the cover of the liquid 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 part 300 can more accurately enter the interior of the battery 100 through the liquid injection safety cap, which is conducive to further improving the manufacturing performance of the battery 100 during the liquid injection process.
  • FIG5 shows a schematic cross-sectional view of a liquid injection safety device 200 provided in an embodiment of the present application.
  • a first inclined guide groove 220 is formed at one end of the liquid 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 liquid injection piece channel 210, and the first inclined guide groove 220 is used to guide the liquid injection piece 300 into the liquid 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.
  • the first inclined guide groove 220 is provided at the inlet end of the injection member channel 210, which can expand the diameter of the injection member channel 210 at the inlet end, which is conducive to the injection member 300 entering the injection member channel 210 more conveniently and smoothly.
  • the injection member 300 is an injection needle
  • the probability of the injection member 300 getting stuck at the inlet end of the injection member channel 210 can be effectively 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 specifically be a truncated cone structure, and its side surface is
  • 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 larger 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.
  • FIG. 6 shows a schematic three-dimensional view of the liquid injection safety device 200 shown in FIG. 5 .
  • a second inclined guide groove 230 may be provided at one end of the liquid filling safety cap that is buckled with the battery 100, and the inclined surface of the second inclined guide groove 230 is inclined relative to the wall of the battery 100 (not shown in FIGS. 5 and 6 ), and the second inclined guide groove 230 is used to guide the battery 100 to buckle with 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, for example, whose 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.
  • the upper bottom area of the second inclined surface guide groove 230 may be smaller than the lower bottom area.
  • the second inclined surface guide groove 230 is designed as a conical surface guide groove, so that the second inclined surface guide groove 230 has a smooth surface, thereby facilitating the battery 100 plays a good guiding role, 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 may be disposed corresponding to the wall where the electrode terminal 1311 of the battery 100 is located (not shown in FIGS. 5 and 6 ), and a first accommodating groove 240 for accommodating the electrode terminal 1311 is formed in the liquid injection safety device 200 .
  • the electrode terminal 1311 and the injection port 1312 of the battery 100 may be located on the same wall of the battery 100.
  • the injection safety device 200 may be disposed on the wall of the battery 100 where the injection port 1312 and the electrode terminal 1311 are located.
  • the surface of the injection safety device 200 facing the injection port 1312 and the wall where the electrode terminal 1311 is located is formed with a first receiving groove 240, so as to facilitate the accommodation of the electrode terminal 1311 of the battery 100, so as to provide good protection for the electrode terminal 1311, and enable the injection safety device 200 and the battery 100 to be accurately aligned, thereby improving the correspondence between the injection member channel 210 in the injection safety device 200 and the injection port 1312 in the battery 100, so as to further improve the manufacturing performance of the battery 100 during the 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.
  • 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.
  • 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 linear air guide channel that penetrates the liquid injection safety device 200.
  • the radial dimension of the air guide channel may be designed to be smaller, for example, the radial dimension of the air guide channel may be smaller than the radial dimension of the liquid injection passage 210.
  • the radial dimension of the air guide channel is designed to be smaller, the possibility of interference in the external environment contacting the battery 100 through the air guide channel may 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 of the liquid injection safety device 200 and the surface facing the external environment, and can also be connected to the first surface and the liquid injection part. Specifically, after the injection piece 300 is withdrawn from the injection piece channel 210, the injection piece channel 210 can also be connected to the atmosphere, and when the air guide groove 260 is connected to the first surface and the injection piece 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 .
  • Fig. 7 shows another schematic structural diagram of the liquid injection safety device 200 provided in an embodiment of the present application cooperating with the battery 100.
  • the liquid injection safety device 200 in the embodiment shown in Fig. 7 may have the same structure as the liquid injection safety device 200 in the embodiments shown in Figs. 5 and 6 above.
  • a sealing member 140 is provided at the injection port 1312 of the battery 100 , and an injection member channel 210 is provided corresponding to the sealing member 140 .
  • the injection member channel 210 is used to pass through the injection member 300 so that the injection member 300 passes through the sealing member 140 and injects electrolyte into the interior 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 needle tip of the injection needle can pierce the sealing member 140 under a certain pressure.
  • the sealing member 140 may also be made of an elastic material. After the liquid injection member 300 is pulled out of the sealing member 140 , the sealing member 140 may be elastically deformed to reduce the gap formed by the liquid injection member 300 in the sealing member 140 .
  • the elastic deformation of the sealing member 140 can make the gap in the sealing member 140 very small or even negligible.
  • the very small gap will basically not affect the sealing of the battery 100. Therefore, in addition to improving the manufacturing performance of the battery 100 during the injection process, 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 is beneficial to comprehensively improve the manufacturing performance and use performance of the battery 100 during the liquid injection process.
  • the material of the sealing member 140 may include rubber.
  • the rubber material may have good sealing performance, certain hardness, and good elastic deformation performance.
  • 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.
  • the filling port 1312 of the battery 100 is provided with a sealing member 140.
  • the filling member 300 is used to pass through the sealing member 140 to enter the interior of the battery 100 for filling. This can further reduce the electrolyte contamination problem caused by electrolyte leakage during the filling process, thereby improving the manufacturing performance of the battery 100 during the filling process and the reliability of the battery 100.
  • the liquid injection safety device 200 may be provided with a second receiving groove 250 , and the second receiving groove 250 is used to receive the sealing member 140 .
  • the second receiving groove 250 can be disposed at one end of the injection member channel 210 facing the battery 100, that is, 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 be designed to match the sealing member 140, so as to play a good protective role on the sealing member 140 and reduce the interference and influence of the external environment on the sealing member 140 during the injection process.
  • FIG. 8 shows another schematic cross-sectional view of the liquid injection safety device 200 provided in an embodiment of the present application.
  • 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 and outside the injection member channel 210.
  • the length L1 of the liquid injection passage 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 needle tip of the injection piece 300 will pass through the injection piece channel 210 to enter the interior of the battery 100, so that a portion of the needle tip 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 member channel 210 can play a good restraining role on the injection member 300, reduce the overall skewness of the injection member 300, and enable the injection member 300 to 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 injection member 300 can pass through the sealing member 140 at a better angle, so that the injection member 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 pass through the injection member channel 210 to enter the interior of the battery 100.
  • 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. ring.
  • 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 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 better wear resistance, higher strength and higher corrosion resistance, so that it can be stably and reliably applied to the liquid injection process of the battery 100, and while playing a role in safety protection of the battery 100, the impact on the battery 100 is small.
  • the liquid injection safety device 200 may be the liquid injection safety cap in the embodiments shown in Fig. 5 to Fig. 7.
  • the relevant structural features of the liquid injection safety device 200 may refer to the relevant description of any embodiment in Fig. 5 to Fig. 7 above.
  • a first inclined surface guide groove 220 is formed at one end of the liquid filling passage 210 away from the battery 100.
  • a second inclined surface guide groove 230 may be provided at one end of the liquid filling safety cap buckled on the battery 100. Both the first inclined surface guide groove 220 and the second inclined surface guide groove 230 may be conical surface guide grooves.
  • the liquid injection safety cap is buckled on the wall where the electrode terminal 1311 and the liquid injection port 1312 are located in the battery 100, wherein a seal 140 is provided at the liquid injection port 1312.
  • the liquid injection safety cap is formed with a first receiving groove 240 for receiving the electrode terminal 1311 and a second receiving groove 250 for receiving the seal 140.
  • the shapes of the first receiving groove 240 and the second receiving groove 250 can match the electrode terminal 1311 and the seal 140, so that the liquid injection safety cap has a better fit with the battery 100.
  • the first receiving groove 240 and the second receiving groove 250 can also realize the accurate alignment of the liquid injection safety cap and the battery 100, so that the liquid injection passage 210 in the liquid injection safety cap can be more accurately aligned with the seal 140 of the battery 100.
  • the liquid filling safety cap may also have an air guide groove 260, which 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 guide the atmospheric gas in the external environment into the liquid filling safety device 200.
  • the pressure between the liquid injection safety device 200 and the battery 100 is increased, which facilitates the separation of the liquid injection safety device 200 from the battery 100, thereby improving the production efficiency of the battery 100.
  • the number of the air guide grooves 260 can be multiple, and the multiple air guide grooves 260 can be respectively arranged on both sides of the liquid injection passage 210.
  • FIG. 9 shows a schematic flowchart of a battery liquid injection method 10 provided in an embodiment of the present application.
  • the battery injection method 10 may include the following steps.
  • a liquid injection safety device is provided on the battery, wherein a liquid injection passage corresponding to the liquid injection port of the battery is formed in the liquid injection safety device.
  • the liquid injection method 10 can be applied to the battery 100 and the liquid injection safety device 200 in any of the above embodiments.
  • the execution subject of the liquid injection method 10 can be a liquid injection system in a battery production line, and the liquid injection system can include multiple liquid injection devices, so as to facilitate the execution of multiple steps in the liquid injection method 10.
  • the battery production line may be equipped with an installation device for installing the liquid injection safety device 200, and the installation device may set the liquid injection safety device 200 on the battery 100, and the liquid injection safety device 200 is formed with a liquid injection member channel 210 corresponding to the liquid injection port 1312 of the battery 100.
  • the relevant design of the liquid injection safety device 200 and the liquid injection member channel 210 can refer to the relevant description of any embodiment of Figures 2 to 8 above.
  • the battery production line may be equipped with a liquid injection control device, which can control the movement of the liquid injection part 300.
  • the liquid injection control device can insert the liquid injection needle into the liquid injection part channel 210 in the liquid injection safety device 200, So that the injection needle can enter the interior of the battery 100 through the injection member channel 210.
  • the relevant design of the injection member channel 210 and the injection member 300 can also refer to the relevant description of any embodiment of Figures 2 to 8 above.
  • 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 method 10 may further include: setting a seal 140 at the injection port 1312 of the battery 100.
  • the above step S102 may include: moving the injection piece 300 in the injection piece channel 210 so that the injection piece 300 enters the interior of the battery 100 through the injection piece channel 210 and the seal 140 at the injection port 1312.
  • the relevant technical solutions of the seal 140 can also refer to the relevant description of the embodiment shown in Figure 7.
  • the seal 140 is provided at the liquid injection port 1312 of the battery 100, the battery 100 can have better liquid injection reliability.
  • the internal gas of the battery 100 may be discharged through the liquid injection piece 300 .
  • the gas inside the battery 100 can be first discharged using the injection piece 300, and then the electrolyte can be 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 internal gas of the battery 100 can be extracted through the liquid injection piece 300.
  • a gas extraction device is configured in the battery production line, and the gas extraction device is connected to the liquid injection piece 300, and extracts the internal gas of the battery 100 through the liquid injection piece 300.
  • a negative pressure may be formed inside the battery 100, and the battery 100 in a normal pressure environment may be in a negative pressure state.
  • the electrolyte can be quickly injected into the interior of the battery 100 through the injection piece 300, which is not only beneficial to increase the injection rate to improve the manufacturing and processing 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 includes gas generated during the closed-end formation process 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.
  • the gas in the battery 100 can be reduced to reduce the internal air pressure of the battery and reduce the possibility of battery explosion.
  • the present application also provides a battery liquid injection system.
  • the battery liquid injection system 1 may include a liquid injection member 300 and a liquid injection safety device 200 .
  • the liquid injection safety device 200 may be configured to be disposed on the battery 100 , and the liquid injection member 300 is used to inject electrolyte into the battery 100 through the liquid injection safety device 200 .
  • the battery injection system 1 may further include an injection device 400 , which is connected to the injection piece 300 , and is used to inject electrolyte into the battery 100 through the injection piece 300 .
  • the liquid injection system 1 of the battery may further include: a seal installation device 500 , which is used to obtain the seal 140 and set the seal 140 at the liquid injection port 1312 of the battery 100 .
  • the battery injection system 1 can also further include other auxiliary equipment, for example, multiple control devices for controlling the injection safety device 200, the injection part 300 and the injection device 400, etc.

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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

提供一种电池的注液安全装置、注液方法和注液系统。电池的注液安全装置应用于具有注液口(1312)的电池(100)，该注液安全装置包括：注液件通道(210)，对应于电池(100)的注液口(1312)设置，注液件通道(210)用于通过注液件(300)，以使得注液件(300)穿过电池(100)的注液口(1312)向电池(100)的内部注入电解液。在注液过程中利用注液安全装置对电池进行防护，注液件能够较为准确的通过注液安全装置中设置的注液件通道穿过电池的注液口，降低了注液件偏移对电池造成影响的可能性，从而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

电池的注液安全装置、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“电池的注液安全装置、注液方法和注液系统”的中国专利申请202310873370.5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安全装置、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安全装置、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安全装置，应用于具有注液口的电池，注液安全装置包括：注液件通道，注液件通道对应于电池的注液口设置，注液件通道用于通过注液件，以使得注液件穿过电池的注液口向电 池的内部注入电解液。
通过本申请实施例的技术方案，利用注液件在电池的内部进行注液，可以降低注液过程中电解液泄露造成的电解液污染问题。进一步地，在注液过程中利用注液安全装置对电池进行防护，注液件能够较为准确的通过注液安全装置中设置的注液件通道穿过电池的注液口，降低了注液件偏移对电池造成影响的可能性，从而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。
在一些可能的实施方式中，注液安全装置包括注液安全帽，注液安全帽被配置为扣合于电池。
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进入电池的内部，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，且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注液安全帽扣合于电池。
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，注液安全装置对应设置于电池的电极端子的所在壁，注液安全装置中形成有用于容纳电极端子的容纳槽。
通过该实施方式的技术方案，注液安全装置中的容纳槽可以对电极端子起到良好的保护作用，且还可以使得注液安全装置与电池准确对位，提升注液安全装置中注液件通道与电池中注液口的对应性，以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，容纳槽的形状匹配于电极端子的形状。
通过该实施方式的技术方案，在第一容纳槽与电极端子相互匹配的情况下，二者之间的对位精度较高，且能够实现紧密配合，提升注液安全装置与电池之间的连接稳定性。与此同时，第一容纳槽与电极端子之间的间隙较小，第一容纳槽能够对电极端子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的干扰和影响。
在一些可能的实施方式中，注液安全装置中设置有导气槽，导气槽连通于注液安全装置中附接于电池的第一表面以及注液安全装置中朝向外部环境的表面。
通过该实施方式的技术方案，导气槽可将外部环境中的大气气体导入至注液安全装置的第一表面与电池之间的间隙中，提高注液安全装置与电池之间的压强，便于该注液安全装置脱离于电池，进而提升电池的生产效率。
在一些可能的实施方式中，导气槽连通于第一表面以及注液安全装置中与第一表面相对的第二表面。
通过该实施方式的技术方案，将导气槽设计为连通相对的第一表面和第二表面，可以便于该导气槽在注液安全装置中的制造，降低注液安全装置的整体制造成本。
在一些可能的实施方式中，电池的注液口设置有密封件，注液件通道对应于密封件设置，注液件通道用于通过注液件，以使得注液件穿过密封件向电池的内部注入电解液。
通过该实施方式的技术方案，电池的注液口设置有密封件，在注液过程中，利用注液件穿过密封件以进入电池的内部进行注液，可以降进一步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。
在一些可能的实施方式中，注液件通道的长度L1与注液件中目标段的长度L2满足：L1≥2×L2，其中，目标段位于注液件朝向电池内部的一端且位于注液件通道以外。
通过该实施方式的技术方案，注液件通道能够对注液件起到较好的约束作用，减小注液件整体的歪斜度，使得注液件能够以较佳的角度进入电池的注液口以降低注液件对注液口的处结构件造成干扰和影响。另外，在电池的注液口设置有密封件的情况下，注液件能够以较佳的角度通过该密封件，从而使得注液件能够有效且快速的穿过密封件以进入电池的内部。
在一些可能的实施方式中，注液件的直径D1与注液件通道的直径D2满足：0＜(D2-D1)/D1≤0.15。
通过该实施方式的技术方案，也能够减小注液件整体的歪斜度，使得注液件能够以较佳的角度进入电池的注液口以降低注液件对注液口的处结构件造成干扰和影响。
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。
第二方面，提供一种电池的注液方法，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电池的注液口的注液件通道；在注液件通道内移动注液件，以使得注液件通过注液件通道以及注液口进入电池的内部；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，在电池上设置注液安全装置之前，注液方法还包括：在电池的注液口设置密封件；上述在注液件通道内移动注液件，以使得注液件通过注液件通道以及注液口进入电池的内部，包括：在注液件通道内移动注液件，以使得注液件通过注液件通道以及密封件进入电池的内部。
第三方面，提供一种电池的注液系统，包括：注液件以及第一方面或第一方面中任一可能实施方式中的注液安全装置，该注液安全装置被配置为设置于电池，注液件用于通过注液安全装置向电池注入电解液。
通过本申请实施例的技术方案，利用注液件在电池的内部进行注液，可以降低注液过程中电解液泄露造成的电解液污染问题。进一步地，在注液过程中利用注液安全装置对电池进行防护，注液件能够较为准确的通过注液安全装置中设置的注液件通道穿过电池的注液口，降低了注液件偏移对电池造成影响的可能性，从而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电池的注液安全装置与电池相互配合一种的示意性立体图；
图3是图2所示注液安全装置与电池沿A-A’方向的截面示意图；
图4是本申请一实施例提供的电池的注液安全装置与电池相互配合的另一示意性立体图；
图5是本申请一实施例提供的注液安全装置的一种示意性截面图；
图6是图5所示注液安全装置的一种示意性立体图；
图7是本申请一实施例提供的电池的注液安全装置与电池相互配合的另一示意性立体图；
图8是本申请一实施例提供的注液安全装置的另一示意性截面图；
图9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10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；
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-注液装置；
500-密封件安装装置；
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。
因此，为了解决上述电解液污染问题，可采用注液针、注液管等注液件作为注液工具，将注液件穿入电池的注液口以进入电池的内部，注液装置可通过注液件将电解液直接注入至电池的内部，以降低电解液泄露至电池的外部的可能性。但在该利用注液件进行注液的技术方案中，若直接采用注液件刺向电池，则该注液件可能会存在刺偏等情况，刺入至电池 除注液口以外的其它部位，例如刺入至电池的电极端子等部位，对电池的制造性能以及后续的使用性能造成一定的影响。
鉴于此，本申请实施例提供一种电池的注液安全装置，应用于具有注液口的电池，该注液安全装置包括：注液件通道，该注液件通道对应于电池的注液口设置，且该注液件通道用于通过注液件，以使得注液件穿过电池的注液口向电池的内部注入电解液。通过本申请实施例的技术方案，利用注液件在电池的内部进行注液，可以降低注液过程中电解液泄露造成的电解液污染问题。进一步地，在注液过程中利用注液安全装置对电池进行防护，注液件能够较为准确的通过注液安全装置中设置的注液件通道穿过电池的注液口，降低了注液件偏移对电池造成影响的可能性，从而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。
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安全装置200与电池100相互配合的示意性立体图。图3示出了图2所示注液安全装置200与电池100沿A-A’方向的截面示意图。
如图2和图3所示，该注液安全装置200应用于具有注液口1312的电池100，该注液安全装置200包括：注液件通道210，该注液件通道210对应于电池100的注液口1312设置，且该注液件通道210用于通过注液件300，以使得注液件300穿过电池100的注液口1312向电池100的内部注入电解液。
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。
具体地，在本申请实施例中，可对电池100配置注液安全装置200，该注液安全装置200中形成有注液件通道210。在对电池100进行注 液之前，可先将该注液安全装置200设置于电池100中注液口1312的所在壁，该注液安全装置200中的注液件通道210可对应于该注液口1312。然后，将注液件300穿过注液件通道210(例如，将注液针刺入注液针通道)，该注液件300能够通过该注液件通道210到达电池100的注液口1312，注液件300进而可通过注液口1312进入电池100的内部以向电池100的内部进行注液。
在一些示例中，如图2和图3所示，电池100的注液口1312可设置于电池100的顶壁，则注液安全装置200可对应设置于电池100的上方，例如设置于电池100的顶壁。注液件300可与注液安全装置200中的注液件通道210同轴设置。该注液件300可沿竖直方向运动，经过注液件通道210之后垂直进入电池100的注液口1312。
在本申请实施例中，注液安全装置200中的注液件通道210的长度需小于注液件300的整体长度，从而便于注液件300穿过注液件通道210进入电池100的内部。另外，注液件通道210的直径也需匹配于注液件300的直径，例如，略大于注液件300的直径，以便于注液件300能够顺滑的通过注液件通道210而不会发生卡顿，且注液件300与电池100的注液口1312具有较佳的对应性。
通过本申请实施例的技术方案，利用注液件300在电池100的内部进行注液，可以降低注液过程中电解液泄露造成的电解液污染问题。进一步地，在注液过程中利用注液安全装置200对电池100进行防护，注液件300能够较为准确的通过注液安全装置200中设置的注液件通道210通过电池100的注液口，降低了注液件300偏移对电池100造成影响的可能性，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。
图4示出了本申请实施例提供的注液安全装置200与电池100相互配合的另一示意性结构图。
如图4所示，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，该注液安全帽被配置为扣合于电池100。
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能够垂直通过该注液口1312，以准确进入电池100的内部进行注液。
在一些实施方式中，如图4所示，在注液口1312形成于其所在壁的中心时，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进入电池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。
图5示出了本申请实施例提供的注液安全装置200的一种示意性截面图。
如图5所示，在本申请实施例提供的注液安全装置200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，且该第一斜面导向槽220用于引导注液件300进入注液件通道210。
具体地，在本申请实施例中，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。在注液件300为注液针的情况下，能够有效降低该注液件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处发生卡顿的概率，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。
图6示出了图5所示注液安全装置200的一种示意性立体图。
参见图5和图6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(图5和图6中未示出)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5和图6所示，注液安全装置200可对应设置于电池100的电极端子1311的所在壁(图5和图6中未示出)，注液安全装置200中形成有用于容纳电极端子1311的第一容纳槽240。
具体地，在该实施方式中，电池100的电极端子1311以及注液口1312可位于电池100的同一壁，在该情况下，注液安全装置200可设置于电池100中注液口1312以及电极端子1311的所在壁。该注液安全装置200朝向该注液口1312以及电极端子1311的所在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，以对该电极端子1311起到良好的保护作用，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与电池100中注液口1312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。
继续参见图5所示，在一些实施方式中，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。
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5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。
图7示出了本申请实施例提供的注液安全装置200与电池100相互配合的另一示意性结构图。可选地，该图7所示实施例中的注液安全装置200可以与上文图5和图6所示实施例中的注液安全装置200的结构相同。
如图7所示，在本申请实施例中，电池100的注液口1312设置有密封件140，注液件通道210对应于该密封件140设置，该注液件通道210用于通过注液件300，以使得注液件300穿过该密封件140向电池100的内部注入电解液。
具体地，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。
可选地，在一些实施方式中，在注液件300为注液针的情况下，该注液针的针头端可在一定压力的作用下刺穿密封件140。
另外，该密封件140还可以为弹性材料，在注液件300抽离密封件140后，该密封件140可弹性形变以减小注液件300在密封件140中形成的缺口。
在该实施方式中，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。
作为示例而非限定，该密封件140的材料可以包括橡胶。该橡胶材料可以兼具较佳的密封性、一定的硬度以及较优的弹性形变性能。
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。
在本申请实施例的技术方案中，电池100的注液口1312设置有密封件140，在注液过程中，利用注液件300穿过密封件140以进入电池100的内部进行注液，可以降进一步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。
为了配合于上述密封件140，结合图5和图7所示，注液安全装置200可设置有第二容纳槽250，该第二容纳槽250用于容纳上述密封件140。
具体地，该第二容纳槽250可设置于注液件通道210朝向电池100的一端，即第二容纳槽250设置于注液件通道210的出口端，从而容纳对应于注液件通道210的密封件140。该第二容纳槽250的形状可以匹配于密封件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8示出了本申请实施例提供的注液安全装置200的另一示意性截面图。
可选地，如图8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。作为示例，在注液件300为注液针的情况下，该目标段位于注液针的针头端且位于注液件通道210以外。
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。
在注液件300为注液针的情况下，注液件300的针头会穿过注液件通道210从而进入电池100的内部，因而该注液件300的针头端中的部分段(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能够以较佳的角度穿过该密封件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8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。
在图8所示实施例中，注液安全装置200可以为图5至图7所示实施例中的注液安全帽。该注液安全装置200中的相关结构特征可以参见上文图5至图7中任一实施例的相关描述。
可选地，在该注液安全帽中，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。另外，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。该第一斜面导向槽220和第二斜面导向槽230均可以为锥面导向槽。
可选地，注液安全帽扣合于电池100中电极端子1311以及注液口1312的所在壁，其中，注液口1312处设置有密封件140。该注液安全帽中形成有容纳该电极端子1311的第一容纳槽240以及密封件140的第二容纳槽250。该第一容纳槽240和第二容纳槽250的形状可以匹配于电极端子1311以及密封件140，以使得注液安全帽与电池100具有较佳的适配度。该第一容纳槽240和第二容纳槽250也可以实现注液安全帽与电池100的准确对位，使得注液安全帽中的注液件通道210能够较为准确的与电池100的密封件140相互对准。
另外，该注液安全帽中还可导气槽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。可选地，该导气槽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。
上文结合图2至图8说明了本申请提供的电池的注液安全装置，下面结合图9说明本申请提供的电池的注液方法。可以理解的是，下文实施例中注液方法的相关技术方案可以与上文实施例中注液安全装置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。
图9示出了本申请实施例提供的一种电池的注液方法10的示意性流程框图。
如图9所示，该电池的注液方法10可包括如下步骤。
S101：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电池的注液口的注液件通道。
S102：在注液件通道内移动注液件，以使得注液件通过注液件通道以及注液口进入电池的内部。
S103：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，注液方法10可应用于上文任一实施例中的电池100以及注液安全装置200。该注液方法10的执行主体可以为电池产线中的注液系统，该注液系统可包括多个注液设备，从而便于执行注液方法10中的多个步骤。
在步骤S101中，电池产线可配置有用于安装注液安全装置200的安装设备，该安装设备可在电池100上设置注液安全装置200，该注液安全装置200中形成有对应于电池100的注液口1312的注液件通道210。可选地，该注液安全装置200以及注液件通道210的相关设计可以参见上文图2至图8任一实施例的相关描述。
在步骤S102中，电池产线可配置有用于注液件控制设备，该注液件控制设备可控制注液件300移动。在注液件300为注液针的情况下，该注液件控制设备可向注液安全装置200中的注液件通道210刺入注液针， 以使得注液针能够通过注液件通道210进入电池100的内部。可选地，该注液件通道210以及注液件300的相关设计也可以参见上文图2至图8任一实施例的相关描述。
在步骤S103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。
在一些可能的实施方式中，在上文步骤S101之前，注液方法10还可以包括：在电池100的注液口1312设置密封件140，在该情况下，上述步骤S102可包括：在注液件通道210内移动注液件300，以使得注液件300通过注液件通道210以及注液口1312处的密封件140进入电池100的内部。
可选地，该密封件140的相关技术方案同样可参见上文图7所示实施例的相关描述。在电池100的注液口1312处设置有密封件140的情况下，该电池100可具有更佳的注液可靠性。
在一些实施方式中，在上文步骤S103之前，即通过注液件300向电池100的内部注入电解液之前，可通过注液件300排放电池100的内部气体。
通过该实施方式的技术方案，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，可通过注液件300抽取电池100的内部气体。具体地，电池产线中配置有抽气装置，该抽气装置连接于注液件300，并通过注液件300抽取电池100的内部气体。在一些示例中，抽气装置对电池100的内部气体进行抽取后，该电池100的内部可形成负压，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，该电池100的内部气体包括电池100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的内部气压，降低电池发生爆炸的可能性。
本申请实施例还提供一种电池的注液系统。如图10所示，该电池的注液系统1可包括注液件300以及注液安全装置200。
具体的，该注液安全装置200可被配置为设置于电池100，注液件300用于通过注液安全装置200向电池100注入电解液。
可选地，如图10所示，该电池的注液系统1还可包括注液装置400，该注液装置400连接于注液件300，该注液装置400用于通过注液件300向电池100的内部注入电解液。
可选地，在电池100的注液口1312处设置有密封件140的情况下，如图10所示，该电池的注液系统1还可进一步包括：密封件安装装置500，该密封件安装装置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。
可以理解的是，在电池的注液系统1中，除了包括图10所示的各注液设备以外，还可以进一步包括其它辅助设备，例如，用于控制注液安全装置200、注液件300以及注液装置400的多个控制设备等等。
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 (14)

  1. 一种电池的注液安全装置，其特征在于，应用于具有注液口(1312)的电池(100)，所述注液安全装置包括：
    注液件通道(210)，所述注液件通道(210)对应于所述电池(100)的注液口(1312)设置，所述注液件通道(210)用于通过注液件(300)，以使得所述注液件(300)穿过所述电池(100)的注液口(1312)向所述电池(100)的内部注入电解液；
    其中，所述注液安全装置包括注液安全帽，所述注液安全帽被配置为扣合于所述电池(100)，所述注液安全帽包括盖体和环形壁，所述盖体对应于所述电池(100)中所述注液口(1312)的所在壁设置，所述环形壁连接于所述盖体朝向所述电池(100)的一侧；
    所述注液安全帽扣合于所述电池(100)的一端设置有第二斜面导向槽(230)，所述第二斜面导向槽(230)的斜面相对于所述电池(100)的壁倾斜，所述第二斜面导向槽(230)用于引导所述注液安全帽扣合于所述电池(100)。
  2. 根据权利要求1所述的注液安全装置，其特征在于，所述注液件通道(210)远离于所述电池(100)的一端形成有第一斜面导向槽(220)，所述第一斜面导向槽(220)的斜面相对于所述注液件通道(210)的轴向倾斜设置，且所述第一斜面导向槽(220)用于引导所述注液件(300)进入所述注液件通道(210)。
  3. 根据权利要求2所述的注液安全装置，其特征在于，所述第一斜面导向槽(220)包括锥面导向槽。
  4. 根据权利要求1所述的注液安全装置，其特征在于，所述第二斜面导向槽(230)包括锥面导向槽。
  5. 根据权利要求1至3中任一项所述的注液安全装置，其特征在于，所述注液安全装置对应设置于所述电池(100)的电极端子(1311)的所在壁，所述注液安全装置中形成有用于容纳所述电极端子(1311)的容纳槽。
  6. 根据权利要求5所述的注液安全装置，其特征在于，所述容纳槽的形状匹配于所述电极端子(1311)的形状。
  7. 根据权利要求1至3中任一项所述的注液安全装置，其特征在于，所述注液安全装置中设置有导气槽(260)，所述导气槽(260)连通于所述注液安全装置中附接于所述电池(100)的第一表面以及所述注液安全装置中朝向外部环境的表面。
  8. 根据权利要求7所述的注液安全装置，其特征在于，所述导气槽(260)连通于所述第一表面以及所述注液安全装置中与所述第一表面相对的第二表面。
  9. 根据权利要求1至3中任一项所述的注液安全装置，其特征在于，所述电池(100)的注液口(1312)设置有密封件(140)，所述注液件通道(210)对应于所述密封件(140)设置，所述注液件通道(210)用于通过所述注液件(300)，以使得所述注液件(300)穿过所述密封件(140)向所述电池(100)的内部注入电解液。
  10. 根据权利要求1至3中任一项所述的注液安全装置，其特征在于，所述注液件通道(210)的长度L1与所述注液件(300)中目标段的长度L2满足：L1≥2×L2，其中，所述目标段位于所述注液件(300)朝向所述电池(100)内部的一端且位于所述注液件通道(210)以外。
  11. 根据权利要求1至3中任一项所述的注液安全装置，其特征在于，所述注液件(300)的直径D1与所述注液件通道(210)的直径D2满足：0＜(D2-D1)/D1≤0.15。
  12. 根据权利要求1至3中任一项所述的注液安全装置，其特征在于，所述注液安全装置的材料包括高分子聚合物。
  13. 一种电池的注液方法，其特征在于，包括：
    在所述电池上设置如权利要求1至12中任一项所述的注液安全装置，所述注液安全装置中形成有对应于所述电池的注液口的注液件通道；
    在所述注液件通道内移动注液件，以使得所述注液件通过所述注液件通道以及所述注液口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。
  14. 一种电池的注液系统，其特征在于，包括：注液件以及，
    如权利要求1至12中任一项所述的注液安全装置，所述注液安全装置被配置为设置于所述电池，所述注液件用于通过所述注液安全装置向所述电池注入电解液。
PCT/CN2023/120218 2023-07-17 2023-09-21 电池的注液安全装置、注液方法和注液系统 Ceased WO2025015702A1 (zh)

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