Liquid injection device, liquid injection equipment, battery monomer, battery device and power utilization device

Abstract

The utility model provides a liquid injection device, liquid injection equipment, a battery monomer, a battery device and a power utilization device, and belongs to the technical field of batteries. The liquid injection device comprises a liquid injection nozzle and a base, the liquid injection nozzle is made of an elastic material and comprises a first liquid injection channel, a liquid collection part and a drainage channel, the liquid collection part is communicated with the first liquid injection channel through the drainage channel, and an opening of the liquid collection part is opened towards the inlet end of the first liquid injection channel; the base comprises a second liquid injection channel, the base abuts against the end face of the inlet end of the liquid injection nozzle, and the first liquid injection channel communicates with the second liquid injection channel. After the liquid injection of the liquid injection device is finished, the liquid injection device is separated from the battery, the liquid injection nozzle recovers the elastic deformation, the liquid collection part rebounds to form local negative pressure, and the residual electrolyte in the first liquid injection channel can be adsorbed to the liquid collection part through the drainage channel for temporary storage under the action of the negative pressure, so that the probability that the electrolyte in the first liquid injection channel drips to pollute the battery is reduced; therefore, the reliability of the liquid injection device is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a liquid injection device, liquid injection equipment, battery cell, battery device, and power consumption device. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] In the mass production of batteries, electrolyte injection is one of the key processes. The injection of electrolyte requires precise control, and after injection, it is necessary to prevent electrolyte from dripping from the injection nozzle and contaminating the battery surface. Electrolyte dripping onto the battery surface not only increases the difficulty of subsequent cleaning processes, but may also cause steel-cased batteries to rust, and even affect welding, thereby seriously affecting the reliability, performance, and lifespan of the battery. Utility Model Content

[0004] This application aims to at least solve one of the technical problems existing in the background art. Therefore, one object of this application is to provide a liquid injection device, liquid injection equipment, battery cell, battery device, and power supply device to reduce the probability of electrolyte dripping and contaminating the battery, and to improve the reliability of the liquid injection device.

[0005] An embodiment of the first aspect of this application provides a liquid injection device, which includes an injection nozzle and a base. The injection nozzle is made of an elastic material and includes a first injection channel, a collection part, and a drainage channel. The collection part is connected to the first injection channel through the drainage channel, and the opening of the collection part is open towards the inlet end of the first injection channel. The base includes a second injection channel, and the base abuts against the end face of the inlet end of the injection nozzle. The first injection channel and the second injection channel are connected.

[0006] In the technical solution of this application embodiment, by providing a liquid collection part on the injection nozzle, the opening of the liquid collection part is open towards the inlet end of the first injection channel. The base abuts against the end face of the inlet end of the injection nozzle, and the liquid collection part can form a sealed structure. The liquid collection part is connected to the first injection channel through a drainage channel. The injection nozzle is made of elastic material. When the injection device injects liquid, the liquid collection part is compressed and deformed. The electrolyte inside the liquid collection part is discharged to the first injection channel along the drainage channel. After the electrolyte injection is completed, the injection device is detached from the battery, the injection nozzle restores its elastic deformation, and the liquid collection part rebounds to form a local negative pressure. Due to the negative pressure, the electrolyte remaining inside the first injection channel can be adsorbed by the drainage channel and temporarily stored in the liquid collection part, reducing the probability of electrolyte dripping from the first injection channel and contaminating the battery, thereby improving the reliability of the injection device.

[0007] In some embodiments, the cross-sectional area of ​​the first injection channel gradually decreases along the direction from the inlet end to the outlet end of the injection nozzle. This gradual decrease in the cross-sectional area of ​​the first injection channel reduces the probability of blockage caused by nozzle deformation during injection, thereby allowing the electrolyte to flow smoothly into the battery and further improving the reliability of the injection device.

[0008] In some embodiments, the injection nozzle further includes a first protrusion located between the first injection channel and the collection section. By providing the first protrusion between the first injection channel and the collection section, the probability of direct communication between the collection section and the first injection channel can be reduced, thereby making the structure of the injection nozzle more stable.

[0009] In some embodiments, the cross-sectional area of ​​the collecting section gradually decreases along the direction from the inlet end to the outlet end of the injection nozzle. This gradual decrease in cross-sectional area facilitates the rapid collection of electrolyte to the bottom of the collecting section.

[0010] In some embodiments, the cross-sectional area of ​​the drainage channel is smaller than that of the first injection channel. This smaller cross-sectional area allows the electrolyte to flow between the collection section and the first injection channel during operation of the injection device, and also ensures that the drainage channel is closed when the injection device is not in operation, thus sealing the collection section.

[0011] In some embodiments, the collecting portion is circumferentially aligned with the first injection channel. This circumferential alignment allows for effective collection of electrolyte from all regions of the first injection channel, improving the reliability of the injection nozzle.

[0012] In some embodiments, the number of liquid collecting sections is one or more. When the number of liquid collecting sections is one, the complexity of connecting the liquid collecting section to the first liquid injection channel can be reduced. When the number of liquid collecting sections is multiple, the symmetrical distribution of the multiple liquid collecting sections can eliminate dead zones in electrolyte collection and significantly reduce the risk of electrolyte residue.

[0013] In some embodiments, the number of drainage channels is greater than or equal to the number of collection sections. Setting the number of drainage channels to be greater than or equal to the number of collection sections can further reduce the risk of electrolyte residue.

[0014] In some embodiments, the injection device further includes a connector for connecting the injection nozzle to the base. Connecting the injection nozzle to the base via the connector makes the connection between the injection nozzle and the base more stable, thus making the structure of the injection device more stable.

[0015] In some embodiments, the injection nozzle includes a limiting portion that extends laterally and is perpendicular to the direction from the inlet end to the outlet end of the injection nozzle. The limiting portion abuts against the connector. Providing a limiting portion on the injection nozzle, and having the limiting portion abut against the connector, facilitates quick assembly and disassembly of the injection device, while also reducing the probability of the injection nozzle detaching.

[0016] In some embodiments, the base includes a second protrusion for inserting a liquid injection nozzle. Providing a second protrusion on the base for inserting the liquid injection nozzle makes the liquid injection device easier to install.

[0017] A second aspect of this application provides a liquid injection device, including the liquid injection apparatus described in the foregoing embodiments. By providing a liquid collection section on the injection nozzle, with the opening of the collection section facing the inlet end of the first liquid injection channel, and by abutting the base against the end face of the inlet end of the injection nozzle, the collection section can form a sealed structure. The collection section is connected to the first liquid injection channel through a drainage channel. The injection nozzle is made of an elastic material. When the liquid injection device injects liquid, the collection section is compressed and deformed. The electrolyte inside the collection section is discharged into the first liquid injection channel along the drainage channel. After the electrolyte injection is completed, the liquid injection device detaches from the battery, the injection nozzle recovers its elastic deformation, and the collection section rebounds to form a local negative pressure. Due to the negative pressure, the residual electrolyte inside the first liquid injection channel can be adsorbed by the drainage channel and temporarily stored in the collection section, reducing the probability of electrolyte dripping from the first liquid injection channel and contaminating the battery. This improves the reliability of the liquid injection device, and consequently, the overall reliability of the liquid injection equipment.

[0018] A third aspect of this application provides a battery cell including a housing assembly with a receiving cavity inside. The housing assembly has a liquid injection port communicating with the receiving cavity. The battery cell is injected with liquid using the liquid injection device described in the previous embodiment, with the liquid injection nozzle injecting liquid into the receiving cavity through the liquid injection port. By using the liquid injection device of this application, the probability of corrosion of the battery cell's housing assembly due to residual electrolyte can be reduced, thereby improving the reliability, performance, and service life of the battery cell.

[0019] An embodiment of the fourth aspect of this application provides a battery device, which includes the battery cells described in the foregoing embodiments. By employing the electrolyte injection device of this application, the reliability, performance, and lifespan of the battery cells are improved, thereby enhancing the reliability, performance, and lifespan of the battery as a whole.

[0020] A fifth aspect of the embodiments of this application provides an electrical device, which includes the battery device in the foregoing embodiments.

[0021] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0022] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0023] Figure 1 This is a schematic diagram of the structure of the liquid injection device according to some embodiments of this application;

[0024] Figure 2 This is an exploded view of the structure of the liquid injection device according to some embodiments of this application;

[0025] Figure 3 This is an exploded structural diagram of a battery cell according to some embodiments of this application;

[0026] Figure 4 Exploded views of battery devices according to some embodiments of this application;

[0027] Figure 5 This is a schematic diagram of the structure of an electrical device according to some embodiments of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1000. Liquid injection device;

[0030] 100. Injection nozzle; 200. Base; 300. Connector;

[0031] 110. First injection channel; 120. Collection section; 130. Drainage channel; 140. First protrusion; 150. Inlet end; 160. Outlet end; 170. Limiting section;

[0032] 210. Second injection channel; 220. Second protrusion;

[0033] 2000, Electrical appliances;

[0034] 500. Battery device;

[0035] 10. Box body; 11. First part; 12. Second part;

[0036] 20. Battery cell; 30. Housing assembly; 21. End cap; 211. Electrode terminal; 212. Liquid filling port; 22. Housing; 23. Cell assembly; 231. Tab. Detailed Implementation

[0037] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0039] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0040] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0041] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0042] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0043] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0044] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0045] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0046] With the rapid development of the battery industry, higher demands are being placed on the efficiency and quality of battery manufacturing. Electrolyte injection is a critical step in mass battery production. To facilitate electrolyte injection, injection devices are used. The injection process requires precise control, and it's essential to prevent electrolyte from dripping from the injection nozzle and contaminating the battery surface. This contamination not only increases the difficulty of subsequent cleaning processes but can also lead to corrosion of steel-cased batteries and even affect welding. Traditional injection device designs often cannot completely prevent electrolyte contamination. After injection, electrolyte can easily drip from the device due to gravity or residual pressure, causing surface contamination. Therefore, developing an injection device that effectively prevents electrolyte dripping, improves injection efficiency, and enhances environmental performance is crucial. This not only helps improve the cleanliness of battery manufacturing and reduce production costs but also provides strong guarantees for battery production quality and lifespan.

[0047] Based on this, this application discloses a liquid injection device. By providing a liquid collection part on the liquid injection nozzle, the opening of the liquid collection part is open towards the inlet end of the first liquid injection channel. The base abuts against the end face of the inlet end of the liquid injection nozzle, and the liquid collection part can form a sealed structure. The liquid collection part is connected to the first liquid injection channel through a drainage channel. The liquid injection nozzle is made of elastic material. When the liquid injection device injects liquid, the liquid collection part is compressed and deformed. The electrolyte inside the liquid collection part is discharged into the first liquid injection channel along the drainage channel. After the electrolyte injection is completed, the liquid injection device is detached from the battery, the liquid injection nozzle restores its elastic deformation, and the liquid collection part rebounds to form a local negative pressure. Due to the negative pressure, the electrolyte remaining inside the first liquid injection channel can be adsorbed into the liquid collection part through the drainage channel for temporary storage, reducing the probability of electrolyte dripping from the first liquid injection channel and contaminating the battery, thereby improving the reliability of the liquid injection device.

[0048] The liquid injection nozzle disclosed in this application can be used, but is not limited to, in the battery production process.

[0049] This application provides an electrolyte injection device 1000 for injecting electrolyte into a battery. Figure 1 This is a schematic diagram of the structure of the liquid injection device 1000 according to some embodiments of this application. Figure 2 Here are exploded views of the structure of the liquid injection device 1000 according to some embodiments of this application, such as... Figure 1 and 2 As shown, the liquid injection device 1000 includes an injection nozzle 100 and a base 200. The injection nozzle 100 is made of an elastic material and includes a first injection channel 110, a collection part 120, and a drainage channel 130. The collection part 120 is connected to the first injection channel 110 through the drainage channel 130, and the opening of the collection part 120 is open towards the inlet end 150 of the first injection channel 110. The base 200 includes a second injection channel 210, and the base 200 abuts against the end face of the inlet end 150 of the injection nozzle 100. The first injection channel 110 and the second injection channel 210 are connected.

[0050] In this embodiment, since the electrolyte is typically corrosive, the injection nozzle 100 needs to be corrosion-resistant. The elastic material used to manufacture the injection nozzle 100 can be any one of corrosion-resistant elastic materials such as fluororubber, ethylene propylene rubber, or neoprene rubber. The injection nozzle 100 deforms when subjected to external force and returns to its original shape after the external force is removed.

[0051] In this embodiment of the application, the liquid collection part 120 can be circumferentially around the first liquid injection channel 110, and the number of liquid collection parts 120 can be one or more, and the number of drainage channels 130 can be greater than or equal to the number of liquid collection parts 120.

[0052] In this embodiment of the application, the cross-sectional area of ​​the inlet end 150 of the first injection channel 110 is greater than the cross-sectional area of ​​the second injection channel 210.

[0053] In this embodiment, the base 200 can be made of stainless steel. The base 200 abuts against the end face of the inlet end 150 of the injection nozzle 100, and the opening of the liquid collection part 120 is open towards the inlet end 150 of the first injection channel 110. That is, the opening of the liquid collection part 120 abuts against the base 200 to form a sealed structure, meaning that the liquid collection part 120 is in a sealed state under normal conditions. The injection nozzle 100 and the base 200 can be connected by a connector 300.

[0054] When injecting electrolyte into the battery using the injection device 1000, the injection nozzle 100 abuts against the injection port on the battery. The injection device 1000 is started. The process of the injection device 1000 delivering electrolyte through the injection nozzle 100 to the injection port is as follows: the injection device 1000 first delivers the electrolyte to the second injection channel 210. After flowing through the second injection channel 210, the electrolyte flows to the first injection channel 110. After flowing through the first injection channel 110, the electrolyte is delivered to the injection port on the battery. During the electrolyte injection process, the injection nozzle 100 is compressed as a whole due to the pressure, and the collecting part 120 is compressed and deformed. The electrolyte inside the collecting part 120 is discharged into the first injection channel 110 along the drainage channel 130. After the electrolyte injection is completed, the injection device 1000 is detached from the battery, the injection nozzle 100 recovers its elastic deformation, and the collecting part 120 rebounds to form a local negative pressure. Due to the negative pressure, the electrolyte remaining inside the first injection channel 110 can be adsorbed into the collecting part 120 through the drainage channel 130 for temporary storage, thereby preventing residual electrolyte from dripping and contaminating the battery surface.

[0055] In this embodiment, a liquid collecting section 120 is provided on the injection nozzle 100, with the opening of the liquid collecting section 120 facing the inlet end 150 of the first injection channel 110. The base 200 abuts against the end face of the inlet end 150 of the injection nozzle 100, allowing the liquid collecting section 120 to form a sealed structure. The liquid collecting section 120 is connected to the first injection channel 110 through a drainage channel 130. The injection nozzle 100 is made of an elastic material. When the injection device 1000 injects liquid, the liquid collecting section 120 is compressed and deformed. The electrolyte inside the battery 20 is discharged into the first injection channel 110 along the drainage channel 130. After the electrolyte injection is completed, the injection device 1000 is detached from the battery, the injection nozzle 100 recovers its elastic deformation, and the collection part 120 rebounds to form a local negative pressure. Due to the negative pressure, the electrolyte remaining inside the first injection channel 110 can be adsorbed by the drainage channel 130 and temporarily stored in the collection part 120, which reduces the probability of electrolyte dripping from the first injection channel 110 and contaminating the battery, thereby improving the reliability of the injection device 1000.

[0056] According to some embodiments of this application, the cross-sectional area of ​​the first injection channel 110 gradually decreases along the direction from the inlet end 150 to the outlet end 160 of the injection nozzle 100.

[0057] In this embodiment, when the electrolyte is injected into the battery using the injection device 1000, the injection nozzle 100 abuts against the injection hole on the battery. The electrolyte flows through the second injection channel 210 to the first injection channel 110 and is injected into the battery through the first injection channel 110. During the injection process, the injection nozzle 100 is compressed as a whole. When the injection nozzle 100 deforms, the first injection channel 110 also deforms. In order to reduce the probability of the first injection channel 110 being blocked due to the deformation of the injection nozzle 100, the cross-sectional area of ​​the first injection channel 110 gradually decreases along the direction from the inlet end 150 to the outlet end 160 of the injection nozzle 100.

[0058] In this embodiment, the cross-sectional area of ​​the first liquid injection channel 110 gradually decreases along the direction from the inlet end 150 to the outlet end 160 of the liquid injection nozzle 100. This can reduce the probability of the first liquid injection channel 110 becoming blocked due to deformation of the liquid injection nozzle 100 during liquid injection by the liquid injection device 1000, thereby allowing the electrolyte to flow smoothly into the battery and further improving the reliability of the liquid injection device 1000.

[0059] According to some embodiments of this application, the injection nozzle 100 further includes a first protrusion 140, which is located between the first injection channel 110 and the collection portion 120.

[0060] In this embodiment, a first protrusion 140 is provided between the first injection channel 110 and the collection portion 120, which can create a gap between the first injection channel 110 and the collection portion 120. During the injection process, when the injection nozzle 100 is compressed as a whole, and during the process of the injection nozzle 100 returning to its original shape after injection, the opening of the collection portion 120 is always in contact with the base 200 to form a sealed structure.

[0061] In this embodiment of the application, by providing a first protrusion 140 between the first injection channel 110 and the collection part 120, the probability of direct communication between the collection part 120 and the first injection channel 110 can be reduced, thereby making the structure of the injection nozzle 100 more stable.

[0062] According to some embodiments of this application, the cross-sectional area of ​​the liquid collecting section 120 gradually decreases along the direction from the inlet end 150 to the outlet end 160 of the injection nozzle 100.

[0063] In this embodiment, the cross-sectional area of ​​the liquid collecting section 120 gradually decreases along the direction from the inlet end 150 to the outlet end 160 of the liquid injection nozzle 100, which is beneficial for the electrolyte collected in the liquid collecting section 120 to quickly converge to the bottom of the liquid collecting section 120.

[0064] According to some embodiments of this application, the cross-sectional area of ​​the drainage channel 130 is smaller than the cross-sectional area of ​​the first injection channel 110.

[0065] In this embodiment, the liquid collecting section 120 is connected to the first liquid injection channel 110 via the drainage channel 130. The function of the drainage channel 130 is to discharge the electrolyte inside the liquid collecting section 120 to the first liquid injection channel 110 along the drainage channel 130 during the process of the liquid injection device 1000 injecting electrolyte into the battery. After the electrolyte injection is completed, the liquid collecting section 120 rebounds to form a local negative pressure. Due to the negative pressure, the electrolyte remaining inside the first liquid injection channel 110 can be adsorbed by the drainage channel 130 and temporarily stored in the liquid collecting section 120. In other words, the drainage channel 130 needs to both drain the electrolyte and keep the liquid collecting section 120 in a sealed state. Therefore, the cross-sectional area of ​​the drainage channel 130 is smaller than the cross-sectional area of ​​the first liquid injection channel 110.

[0066] In this embodiment, the cross-sectional area of ​​the drainage channel 130 is smaller than that of the first injection channel 110. This allows the electrolyte to flow between the collection section 120 and the first injection channel 110 through the drainage channel 130 when the injection device 1000 is working, and also allows the drainage channel 130 to be in a closed state when the injection device 1000 is not working, thereby keeping the collection section 120 sealed.

[0067] According to some embodiments of this application, the liquid collection section 120 is circumferentially oriented around the first liquid injection channel 110.

[0068] In this embodiment, the number of liquid collecting sections 120 can be one or more. When there is only one liquid collecting section 120, it can be a ring-shaped structure, and the liquid collecting section 120 is arranged around the circumference of the first liquid injection channel 110. When there are multiple liquid collecting sections 120, the shapes of the multiple liquid collecting sections 120 can not be exactly the same, and the multiple liquid collecting sections 120 can be arranged at intervals around the circumference of the first liquid injection channel 110.

[0069] In this embodiment, the liquid collecting part 120 surrounds the first liquid injection channel 110 in a circumferential direction, which can effectively collect the electrolyte in all areas of the first liquid injection channel 110, thereby improving the reliability of the liquid injection nozzle 100.

[0070] According to some embodiments of this application, the number of liquid collection sections 120 is one or more.

[0071] In this embodiment, when there is only one liquid collecting section 120, the complexity of connecting the liquid collecting section 120 to the first liquid injection channel 110 can be reduced. When there are multiple liquid collecting sections 120, the symmetrical distribution of the multiple liquid collecting sections 120 can eliminate dead zones in electrolyte collection and significantly reduce the risk of electrolyte residue.

[0072] According to some embodiments of this application, the number of drainage channels 130 is greater than or equal to the number of collection sections 120.

[0073] Each liquid collection section 120 can be connected to the first liquid injection channel 110 through one or more drainage channels 130.

[0074] In this embodiment, the number of drainage channels 130 is greater than or equal to the number of liquid collection sections 120, which can further reduce the risk of electrolyte residue.

[0075] According to some embodiments of this application, the liquid injection device 1000 further includes a connector 300 for connecting the liquid injection nozzle 100 and the base 200.

[0076] In this embodiment, the connector 300 can be a nut. Connecting the injection nozzle 100 to the base 200 via the connector 300 makes the connection between the injection nozzle 100 and the base 200 more stable, thus making the structure of the injection device 1000 more stable.

[0077] According to some embodiments of this application, such as Figure 2 As shown, the injection nozzle 100 includes a limiting part 170, which extends laterally and is perpendicular to the direction from the inlet end 150 to the outlet end 160 of the injection nozzle 100. The limiting part 170 abuts against the connector 300.

[0078] In this embodiment of the application, a limiting part 170 is provided on the injection nozzle 100, and the limiting part 170 abuts against the connector 300, which facilitates the quick assembly and disassembly of the injection device 1000, and also reduces the probability of the injection nozzle 100 falling off.

[0079] According to some embodiments of this application, the base 200 includes a second protrusion 220 for inserting the injection nozzle 100.

[0080] In this embodiment of the application, a second protrusion 220 is provided on the base 200, and the second protrusion 220 is inserted into the injection nozzle 100, which makes it easier to install the injection device 1000.

[0081] A second aspect of the embodiments of this application provides a liquid injection device, including the liquid injection device 1000 in the foregoing embodiments.

[0082] In this embodiment, a liquid collecting section 120 is provided on the injection nozzle 100, with the opening of the liquid collecting section 120 facing the inlet end 150 of the first injection channel 110. The base 200 abuts against the end face of the inlet end 150 of the injection nozzle 100, allowing the liquid collecting section 120 to form a sealed structure. The liquid collecting section 120 is connected to the first injection channel 110 through a drainage channel 130. The injection nozzle 100 is made of an elastic material. When the injection device 1000 injects liquid, the liquid collecting section 120 is compressed and deformed, and the electrolysis inside the liquid collecting section 120... The electrolyte is discharged into the first injection channel 110 through the drainage channel 130. After the electrolyte injection is completed, the injection device 1000 is detached from the battery, the injection nozzle 100 recovers its elastic deformation, and the collection part 120 rebounds to form a local negative pressure. Due to the negative pressure, the electrolyte remaining in the first injection channel 110 can be adsorbed by the drainage channel 130 and temporarily stored in the collection part 120, which reduces the probability of electrolyte dripping from the first injection channel 110 and contaminating the battery, thereby improving the reliability of the injection device 1000 and thus improving the reliability of the injection equipment.

[0083] A third aspect of the embodiments of this application provides a battery cell 20. Figure 3 This is an exploded structural diagram of a battery cell 20 according to some embodiments of this application. The battery cell 20 includes a housing assembly 30, which has a receiving cavity. The housing assembly 30 has a liquid injection port 212 communicating with the receiving cavity. The battery cell 20 is injected with liquid using the liquid injection device 1000 in the aforementioned embodiments. The liquid injection device 1000 injects liquid into the receiving cavity through the liquid injection port 212.

[0084] The battery cell 20 refers to the smallest unit that makes up a battery. For example... Figure 3 The battery cell 20 includes a housing assembly 30, a cell assembly 23, and other functional components. The housing assembly 30 includes an end cap 21 and a housing 22.

[0085] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Optionally, end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed under pressure or impact, allowing battery cell 20 to have higher structural strength and improved safety performance. End cap 21 can be provided with functional components such as electrode terminals 211 and liquid injection port 212. Electrode terminals 211 can be used for electrical connection with cell assembly 23 to output or input electrical energy to battery cell 20. Liquid injection port 212 can be used for connection with injection nozzle 100 to inject liquid into the receiving cavity. In some embodiments, end cap 21 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The end cap 21 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating element can be provided on the inner side of the end cap 21. The insulating element can be used to isolate the electrical connection components inside the housing 22 from the end cap 21 to reduce the risk of short circuit. For example, the insulating element can be plastic, rubber, etc.

[0086] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the cell assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 closes the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the cell assembly 23. The housing 22 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0087] The cell assembly 23 is the component in the battery cell 20 where the electrochemical reaction occurs. The casing 22 may contain one or more cell assemblies 23. The cell assembly 23 is mainly formed by winding or stacking positive and negative electrode plates, and typically a separator is provided between the positive and negative electrode plates. The portions of the positive and negative electrode plates containing active material constitute the main body of the cell assembly 23, while the portions of the positive and negative electrode plates without active material each constitute a tab 231. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs 231 connect to the electrode terminals to form a current loop.

[0088] In this embodiment, the battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell can be cylindrical, flat, cuboid, etc.

[0089] Specifically, the outlet end 160 of the injection nozzle 100 can be aligned with the injection port on the battery cell. For example, the injection nozzle 100 can be inserted into or cover the injection port. The injection device 1000 can be started, and the injection device 1000 can deliver electrolyte through the injection nozzle 100 to the injection port. The electrolyte injected through the injection port can be injected into the receiving cavity, thereby realizing the injection of electrolyte into the battery cell.

[0090] By using the electrolyte injection device 1000 of this application embodiment to inject electrolyte, the probability of corrosion of the housing assembly 30 of the battery cell 20 due to residual electrolyte can be reduced, thereby improving the reliability, performance and service life of the battery cell 20.

[0091] A fourth aspect of the embodiments of this application provides a battery device 500. Figure 4 This is an exploded view of a battery device 500 according to some embodiments of this application. The battery device 500 includes the battery cell 20 in the foregoing embodiments.

[0092] In this embodiment, the battery device 500 includes a housing 10 and a battery cell 20, with the battery cell 20 housed within the housing 10. The housing 10 provides a space for the battery cell 20 and can have various structures. In some embodiments, the housing 10 may include a first portion 11 and a second portion 12, which overlap each other, jointly defining a space for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one open end, and the first portion 11 may be a plate-like structure, covering the open side of the second portion 12 so that the first portion 11 and the second portion 12 jointly define the space. Alternatively, both the first portion 11 and the second portion 12 may be hollow structures with one open side, with the open side of the first portion 11 covering the open side of the second portion 12. Of course, the housing 10 formed by the first portion 11 and the second portion 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0093] In the battery device 500, there can be multiple battery cells 20, which can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 500 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is also housed within the housing 10. The battery device 500 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0094] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0095] In this embodiment, the battery device 500 can be applied to, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0096] In this embodiment of the application, the use of the liquid injection device 1000 improves the reliability, performance and service life of the battery cell 20, thereby improving the reliability, performance and service life of the battery device 500.

[0097] The fifth aspect of this application provides an electrical device 2000. Figure 5 This is a schematic diagram of the structure of an electrical device 2000 according to some embodiments of this application. The electrical device 2000 includes the battery device 500 in the foregoing embodiments.

[0098] In the embodiment of the application, a battery device 500 is provided inside the electrical device 2000. The battery device 500 can be used to supply power to the electrical device 2000; for example, the battery device 500 can serve as the operating power source for the electrical device 2000.

[0099] In this application embodiment, the electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0100] The technical solution of this application will be further described below through a specific embodiment, such as... Figures 1 to 2 As shown,

[0101] The liquid injection device 1000 includes an injection nozzle 100, a base 200, and a connector 300, which is used to connect the injection nozzle 100 and the base 200.

[0102] The injection nozzle 100 is made of an elastic material and includes a first injection channel 110, a collection portion 120, a drainage channel 130, and a first protrusion 140. The cross-sectional area of ​​the first injection channel 110 gradually decreases along the direction from the inlet end 150 to the outlet end 160 of the injection nozzle 100; the cross-sectional area of ​​the collection portion 120 gradually decreases along the direction from the inlet end 150 to the outlet end 160 of the injection nozzle 100, and the collection portion 120 is circumferentially related to the first injection channel 110. There may be one or more collection portions 120, and the number of drainage channels 130 is greater than or equal to the number of collection portions 120; the collection portion 120 is connected to the first injection channel 110 through the drainage channel 130. Channel 110 is connected, and the cross-sectional area of ​​the drainage channel 130 is smaller than that of the first injection channel 110. The opening of the liquid collection part 120 is open towards the inlet end 150 of the first injection channel 110. The first protrusion 140 is located between the first injection channel 110 and the liquid collection part 120. The injection nozzle 100 includes a limiting part 170, which extends laterally and is perpendicular to the direction from the inlet end 150 to the outlet end 160 of the injection nozzle 100. The limiting part 170 abuts against the connector 300.

[0103] The base 200 includes a second injection channel 210 and a second protrusion 220. The second protrusion 220 is used to insert the injection nozzle 100. The base 200 abuts against the end face of the inlet end 150 of the injection nozzle 100. The first injection channel 110 is connected to the second injection channel 210.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A liquid injection device (1000) for injecting electrolyte into a battery, characterized in that, The liquid injection device (1000) includes: The injection nozzle (100) is made of an elastic material and includes a first injection channel (110), a collection part (120) and a drainage channel (130). The collection part (120) is connected to the first injection channel (110) through the drainage channel (130), and the opening of the collection part (120) is open towards the inlet end (150) of the first injection channel (110). The base (200) includes a second injection channel (210). The base (200) abuts against the end face of the inlet end (150) of the injection nozzle (100). The first injection channel (110) is connected to the second injection channel (210).

2. The liquid injection device (1000) according to claim 1, characterized in that, The cross-sectional area of ​​the first injection channel (110) gradually decreases along the direction from the inlet end (150) to the outlet end (160) of the injection nozzle (100).

3. The liquid injection device (1000) according to claim 1, characterized in that, The injection nozzle (100) further includes a first protrusion (140) located between the first injection channel (110) and the collection part (120).

4. The liquid injection device (1000) according to claim 1, characterized in that, The cross-sectional area of ​​the liquid collection section (120) gradually decreases along the direction from the inlet end (150) to the outlet end (160) of the injection nozzle (100).

5. The liquid injection device (1000) according to claim 1, characterized in that, The cross-sectional area of ​​the drainage channel (130) is smaller than that of the first injection channel (110).

6. The liquid injection device (1000) according to any one of claims 1 to 5, characterized in that, The liquid collection section (120) is circumferentially oriented around the first liquid injection channel (110).

7. The liquid injection device (1000) according to any one of claims 1 to 5, characterized in that, The number of liquid collection sections (120) is one or more.

8. The liquid injection device (1000) according to claim 7, characterized in that, The number of drainage channels (130) is greater than or equal to the number of liquid collection sections (120).

9. The liquid injection device (1000) according to any one of claims 1 to 5, characterized in that, The injection device (1000) further includes a connector (300) for connecting the injection nozzle (100) to the base (200).

10. The liquid injection device (1000) according to claim 9, characterized in that, The injection nozzle (100) includes a limiting part (170) that extends laterally and is perpendicular to the direction from the inlet end (150) to the outlet end (160) of the injection nozzle (100). The limiting part (170) abuts against the connector (300).

11. The liquid injection device (1000) according to any one of claims 1 to 5, characterized in that, The base (200) includes a second protrusion (220) for inserting the injection nozzle (100).

12. A liquid injection device, characterized in that, The injection device includes the injection apparatus (1000) according to any one of claims 1 to 11.

13. A battery cell (20), characterized in that, The device includes a housing assembly (30) having a receiving cavity, and a liquid injection port (212) communicating with the receiving cavity. The battery cell (20) is injected with liquid using a liquid injection device (1000) according to any one of claims 1 to 11, and the liquid injection device (1000) injects liquid into the receiving cavity through the liquid injection port (212).

14. A battery device (500), characterized in that, Includes the battery cell (20) as described in claim 13.

15. An electrical appliance (2000), characterized in that, Includes the battery device (500) as described in claim 14.

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