Electrolyte injection detection device and method and electrolyte injection system for battery

Abstract

An electrolyte injection detection device (200) and method and electrolyte injection system (1) for a battery (100). The electrolyte injection detection device (200) for a battery (100) is applied to an electrolyte injection member (300) of the battery (100) and is configured to move along a preset movement path (P). The electrolyte injection detection device (200) comprises a first sensor (210), which is arranged facing an end portion of the electrolyte injection member (300) and is located in the preset movement path (P), wherein the first sensor (210) is configured to detect the movement of the end portion of the electrolyte injection member (300), so as to detect the integrity of the end portion of the electrolyte injection member (300). An electrolyte injection member (300) for a battery (100) is provided with an electrolyte injection detection device (200), and a first sensor (210) in the electrolyte injection detection device (200) can be configured to detect the integrity of an end portion of the electrolyte injection member (300), thereby reducing influence on an electrolyte injection process of the battery (100) when the end portion of the electrolyte injection member (300) is incomplete, and thus improving the manufacturing performance of the battery (100) during an electrolyte injection process and the use reliability of the battery (100).

Description

Battery filling detection device, method and filling system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202310874478.6, filed on July 17, 2023, entitled “Battery filling detection device, method and filling system,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The embodiments of the present application relate to the field of batteries, and more specifically, to a battery liquid injection detection device, method, and liquid injection system. Background Art

[0004] With the development of the times, electric vehicles have huge market prospects due to their high environmental protection, low noise, low cost of use and other advantages. They can effectively promote energy conservation and emission reduction, and are beneficial to social development and progress. For electric vehicles, battery technology is a key factor in their development.

[0005] In the development of battery technology, in addition to focusing on electrical performance such as charging and discharging, attention must also be paid to battery manufacturing and processing performance. For example, the electrolyte, a component of the battery, and the process of injecting the electrolyte into the battery casing are crucial to the overall performance of the battery. Given this, how to improve the manufacturing performance of batteries during the electrolyte injection process is a technical problem that needs to be solved urgently.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide a battery liquid injection detection device, method and liquid injection system, which can improve the manufacturing performance of the battery during the liquid injection process.

[0008] In a first aspect, a battery liquid injection detection device is provided, which is applied to a battery liquid injection part, and the liquid injection part is configured to move along a preset moving path. The liquid injection detection device includes: a first sensor, which is arranged toward the end of the liquid injection part and is located in the preset moving path. The first sensor is used to detect the movement of the end of the liquid injection part to detect whether the end of the liquid injection part is intact.

[0009] Through the technical solution of the embodiment of the present application, a liquid injection detection device is provided for the liquid injection part of the battery. The first sensor in the liquid injection detection device can be used to detect the integrity of the end of the liquid injection part, thereby reducing the impact of the missing end of the liquid injection part on the liquid injection process of the battery. For example, when the liquid injection part includes an injection needle, the possibility of the missing needle tip of the injection needle being unable to penetrate the interior of the battery can be reduced, and / or the impact of impurity particles dropped by the missing liquid injection part on the battery can be reduced, thereby improving the manufacturing performance of the battery during the liquid injection process and the reliability of the battery.

[0010] In some possible embodiments, the liquid injection detection device further includes: a second sensor, in which a detection channel corresponding to the liquid injection piece is formed, the detection channel is located in a preset moving path, and the detection channel is used to pass through the liquid injection piece to detect whether the liquid injection piece is skewed.

[0011] Through the technical solution of this embodiment, the second sensor in the liquid filling detection device can be used to detect whether the end of the liquid filling piece is skewed, reducing the impact of the end of the liquid filling piece on the liquid filling process of the battery when it is skewed. For example, it reduces the possibility of the skewed liquid filling piece being punctured and thus penetrating into other parts of the battery except the liquid filling port, thereby improving the manufacturing performance of the battery during the liquid filling process and the reliability of the battery.

[0012] In some possible implementations, in the preset movement path, the second sensor is disposed upstream of the first sensor, and the liquid injection piece is configured to move toward the first sensor after passing through a detection channel in the second sensor.

[0013] Through the technical solution of this embodiment, the liquid filling detection device is equipped with both a first sensor and a second sensor. The first sensor can be used to detect whether the end of the liquid filling piece is intact, and the second sensor can be used to detect whether the end of the liquid filling piece is skewed. This improves the comprehensiveness of the detection of the liquid filling piece, greatly reduces the impact of abnormal conditions at the end of the liquid filling piece on the battery filling process, and improves the manufacturing performance of the battery during the liquid filling process. Furthermore, the second sensor is arranged upstream of the first sensor, and the relative position relationship between the two is designed to be relatively compact and reasonable. While being able to provide both integrity and skew detection for the liquid filling piece, the two sensors do not require a large amount of equipment space.

[0014] In some possible implementations, the liquid injection detection device further includes: a receiving cavity, the first sensor is disposed inside the receiving cavity, and the second sensor covers the receiving cavity.

[0015] Through the technical solution of this embodiment, a accommodating chamber is set in the liquid injection detection device, which allows the first sensor and the second sensor to be compactly and relatively stably arranged together, and the second sensor is located upstream of the first sensor. The first sensor and the second sensor can effectively and compactly perform integrity and skewness detection on the liquid injection part.

[0016] In some possible implementations, the preset movement path is the same as the injection movement path of the injection piece when injecting liquid into the battery.

[0017] Through the technical solution of this embodiment, the liquid injection member can have only one movement path to complete the liquid injection of the liquid injection member into the battery and the detection of the liquid injection member by the liquid injection detection device. The control method of the liquid injection member is relatively simple and easy to implement. In addition, the liquid injection process and the liquid injection member detection process use the same movement path, which can facilitate the adaptive adjustment of the position of the first sensor and / or second sensor in the liquid injection detection device according to the different sizes and shapes of the batteries. This conveniently enables the liquid injection member to not only inject liquid into batteries of various sizes and shapes, but also use the liquid injection detection device to detect the liquid injection member.

[0018] In some possible embodiments, the first sensor is arranged at the end point of a preset moving path of the injection piece, and is used to detect whether the end of the injection piece contacts the first sensor; when the end of the injection piece contacts the first sensor, the first sensor is used to detect that the end of the injection piece is intact; when the end of the injection piece does not contact the first sensor, the first sensor is used to detect that the end of the injection piece is missing.

[0019] Through the technical solution of this embodiment, the first sensor can effectively and reliably detect the integrity of the end of the liquid injection piece by detecting contact with the end of the liquid injection piece. Furthermore, the structure of the first sensor is easy to implement and highly reliable, which helps reduce the cost of the liquid injection detection device and thus reduce the cost of battery production lines.

[0020] In some possible embodiments, the first sensor is arranged downstream of a preset moving path of the injection piece, and is used to detect the moving stroke of the end of the injection piece; when the moving stroke of the end of the injection piece is greater than or equal to a preset threshold, the first sensor is used to detect that the end of the injection piece is intact; when the moving stroke of the end of the injection piece is less than the preset threshold, the first sensor is used to detect that the end of the injection piece is missing.

[0021] Through the technical solution of this embodiment, the first sensor can effectively and reliably detect the integrity of the end of the injection piece by detecting the movement of the end of the injection piece. On this basis, the first sensor can further detect the degree of end loss of the injection piece, thereby providing a more comprehensive detection function for the injection piece.

[0022] In some possible embodiments, the detection channel in the second sensor is used to detect whether the injection piece contacts the inner circumference of the detection channel; when the injection piece contacts the inner circumference of the detection channel, the second sensor is used to detect whether the injection piece is skewed; when the injection piece does not contact the inner circumference of the detection channel, the second sensor is used to detect that the injection piece is not skewed.

[0023] Through the technical solution of this embodiment, the second sensor can effectively and reliably detect the skewness of the end of the liquid injection piece by detecting the contact of the end of the liquid injection piece. Furthermore, the structure of the second sensor is easy to implement and highly reliable, which helps reduce the cost of the liquid injection detection device and thus reduce the cost of the battery production line.

[0024] In some possible embodiments, the liquid injection detection device further includes: a processing module, the processing module is electrically connected to the first sensor and the second sensor, and the processing module is used to receive detection signals from the first sensor and the second sensor and / or control the first sensor and the second sensor to perform detection.

[0025] Through the technical solution of this embodiment, a processing module is provided in the liquid injection detection device. This processing module can process the detection signals of the first sensor and / or the second sensor, thereby effectively monitoring the detection process of the liquid injection piece. In addition, the processing module can also control the operation of the first sensor and / or the second sensor, which helps reduce the power consumption required during the liquid injection piece detection process.

[0026] In some possible implementations, the diameter D1 of the liquid injection piece and the diameter D2 of the detection channel in the second sensor satisfy: 0<(D2-D1) / D1≤0.15.

[0027] In the technical solution of this embodiment, by designing the diameter of the injection piece and the diameter of the detection channel in the second sensor, the second sensor can effectively detect the skewness of the end of the injection piece, further improving the detection performance of the injection detection device for the injection piece.

[0028] In some possible implementations, the first sensor is configured to be movable along an extension direction of a preset movement path.

[0029] Through the technical solution of this embodiment, the initial distance between the first sensor and the injection piece is adjustable and can be designed based on the distance between the injection piece and the battery. When the battery model or dimensions change, the injection path of the injection piece will also change. To adapt to the injection path of the injection piece, the initial distance between the first sensor and the injection piece, as well as the preset movement path during the detection process, also change synchronously. This allows the first sensor to be applied to the detection of injection pieces of batteries of various models or dimensions.

[0030] In some possible implementations, the moving distance of the first sensor in the extension direction of the preset moving path is between 0 and 50 mm.

[0031] In this embodiment, the moving distance range of the first sensor can be adapted to the size of most batteries in the related technology. Therefore, the first sensor can be applied to the liquid injection parts of most batteries in the related technology, which is conducive to the promotion and use of the liquid injection detection device in the battery production line.

[0032] In some possible implementations, the liquid filling detection device is used to detect the liquid filling member before the liquid filling member fills the battery and / or after the liquid filling member fills the battery.

[0033] The technical solution of this embodiment is conducive to the continuous injection of liquid by the injection component into multiple batteries in the battery production line, thereby improving the injection reliability of the injection component into each battery.

[0034] In a second aspect, a battery injection detection method is provided, which is applied to the battery injection part. The method includes: controlling the battery injection part to move along a preset moving path, in which a first sensor is provided; and using the first sensor to detect the movement of the end of the injection part to detect whether the end of the injection part is intact.

[0035] In some possible embodiments, a second sensor is further provided in the preset moving path, and a detection channel for the liquid injection piece is formed in the second sensor; the liquid injection detection method further includes: using the detection channel in the second sensor to detect whether the end of the liquid injection piece is skewed.

[0036] In some possible embodiments, in a preset moving path, the second sensor is arranged upstream of the first sensor; the above-mentioned control of the battery injection part to move along the preset moving path includes: controlling the injection part to move toward the first sensor after passing through the detection channel in the second sensor along the preset moving path.

[0037] In some possible implementations, the preset movement path is the same as the injection movement path of the injection piece when injecting liquid into the battery.

[0038] In a third aspect, a battery injection system is provided, comprising: an injection piece and an injection detection device according to the first aspect or any possible implementation of the first aspect, wherein the injection detection device is used to detect the injection piece.

[0039] Through the technical solution of the embodiment of the present application, a liquid injection detection device is provided for the liquid injection part of the battery. The first sensor in the liquid injection detection device can be used to detect the integrity of the end of the liquid injection part, thereby reducing the impact of the missing end of the liquid injection part on the liquid injection process of the battery. For example, when the liquid injection part includes an injection needle, the possibility of the missing needle tip of the injection needle being unable to penetrate the interior of the battery can be reduced, and / or the impact of impurity particles dropped by the missing liquid injection part on the battery can be reduced, thereby improving the manufacturing performance of the battery during the liquid injection process and the reliability of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0041] FIG1 is a schematic structural diagram of a battery provided in one embodiment of the present application;

[0042] FIG2 is a schematic perspective view of the cooperation between the battery liquid filling detection device and the liquid filling member provided in one embodiment of the present application;

[0043] FIG3 is another schematic perspective view of the cooperation between the battery liquid filling detection device and the liquid filling member provided in one embodiment of the present application;

[0044] FIG4 is another schematic perspective view of the cooperation between the battery liquid filling detection device and the liquid filling member provided in one embodiment of the present application;

[0045] FIG5 is another schematic perspective view of the cooperation between the battery liquid filling detection device and the liquid filling member provided in one embodiment of the present application;

[0046] FIG6 is a schematic flow chart of a battery filling detection method provided in one embodiment of the present application;

[0047] FIG7 is another schematic flow chart of a battery liquid filling detection method provided in one embodiment of the present application;

[0048] FIG8 is a schematic structural block diagram of a battery injection system provided in one embodiment of the present application.

[0049] In the drawings, the drawings are not drawn to scale.

[0050] Description of reference numerals:

[0051] 100 - battery; 110 - housing; 120 - electrode assembly, 121 - tab; 130 - end cap assembly, 1301 - negative end cap, 1302 - positive end cap, 1311 - electrode terminal, 1312 - liquid injection port;

[0052] 200 - liquid injection detection device; 210 - first sensor, 220 - second sensor, 221 - detection channel, 230 - receiving chamber, 240 - processing module;

[0053] 300- injection parts;

[0054] 400-liquid injection device;

[0055] 1-Battery filling system. DETAILED DESCRIPTION

[0056] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0057] In the description of this application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly perpendicular, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0058] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0059] The term "and / or" in this application simply describes an association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0060] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0061] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0062] In the field of new energy, batteries are the main power source for electrical devices such as electric vehicles, ships or spacecraft, and their importance is self-evident. In the present application, the battery may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc., and the embodiments of the present application are not limited to this. In some related technologies, the battery may also be referred to as a battery cell or a battery core. In a specific implementation, one or more batteries may form a battery module or a battery pack to provide higher voltage and capacity to the electrical device. Optionally, the battery pack may include a casing for encapsulating one or more batteries. The casing can reduce the impact of liquid or other foreign matter on the charging or discharging of the battery.

[0063] In this application, the battery can be cylindrical, flat, rectangular, or other shapes, and the embodiments of this application do not limit this. In addition, batteries are generally divided into three types according to the packaging method: cylindrical batteries, prismatic batteries, and soft-pack batteries, and the embodiments of this application do not limit this.

[0064] The development of battery technology requires simultaneous consideration of multiple design factors. For example, to improve battery charge and discharge performance, various performance parameters must be considered, including energy density, cycle life, discharge capacity, and charge and discharge rate. Furthermore, battery manufacturing efficiency and performance are crucial to the promotion, application, and long-term development of batteries.

[0065] A battery generally consists of a housing, an electrode assembly, and an electrolyte. The housing holds the electrode assembly and electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. The electrolyte acts as an electrolyte, conducting ions between the positive and negative electrode sheets of the electrode assembly, enabling the battery to function properly. For lithium batteries, the electrolyte can include lithium salts and organic solvents.

[0066] During battery manufacturing, the battery filling process (i.e., the process of injecting electrolyte into the battery housing) is also a very important process. The production and manufacturing performance of this filling process will affect the final product performance of the battery. In some related technologies, during the battery filling process, a filling tool (such as a filling nozzle, etc.) is set at the edge of the battery's filling port, and the battery is filled into the filling port through this filling tool. If the filling tool does not make good contact with the edge of the filling port, there may be a risk of leakage during the filling process, resulting in electrolyte contamination problems, affecting subsequent battery manufacturing and battery product performance.

[0067] Therefore, in order to solve the above-mentioned electrolyte contamination problem, injection parts such as injection needles and injection tubes can be used as injection tools, and the injection parts can be inserted into the injection port of the battery to enter the interior of the battery. The injection device can inject the electrolyte directly into the interior of the battery through the injection parts to reduce the possibility of electrolyte leakage to the outside of the battery. However, in the technical solution of using injection parts for injection, if an abnormality occurs at the end of the injection part (such as the needle of the injection needle), it will affect the injection performance of the injection part to the battery, and thus have a certain impact on the manufacturing performance and subsequent use performance of the battery. For example, when there is an abnormality such as the needle of the injection needle is missing, the missing injection needle may not be able to smoothly enter the interior of the battery to inject the battery, or the injection needle may also drop impurity particles that have a certain impact on the battery. For example, when the particles are metal, the particles may cause a short circuit in the battery, leading to more serious consequences.

[0068] In view of this, an embodiment of the present application provides a battery liquid injection detection device, which can be applied to the battery liquid injection part, the liquid injection part is configured to move along a preset movement path, and the liquid injection detection device includes: a first sensor, which is arranged toward the end of the liquid injection part and is located in the preset movement path, and the first sensor is used to detect the movement of the end of the liquid injection part to detect whether the end of the liquid injection part is intact. Through the technical solution of the embodiment of the present application, a first sensor is provided for the battery liquid injection part, and the first sensor can be used to detect the integrity of the end of the liquid injection part, reducing the impact of the end of the liquid injection part missing on the battery's liquid injection process. For example, in the case where the liquid injection part includes a liquid injection needle, the possibility of the needle tip of the liquid injection needle being missing and being unable to penetrate the interior of the battery can be reduced, and / or the impact of impurity particles dropped by the missing liquid injection part on the battery can be reduced, thereby improving the manufacturing performance of the battery during the liquid injection process and the reliability of the battery.

[0069] The technical solutions described in the embodiments of this application are applicable to various battery-powered devices, such as electric vehicles, electric bicycles, power tools, ships, and spacecraft, among which spacecraft include aircraft, rockets, space shuttles, and spacecraft. It should be understood that the technical solutions described in the embodiments of this application are not limited to the devices described above, but can also be applied to all battery-powered devices.

[0070] FIG1 shows a schematic structural diagram of a battery 100 provided in one embodiment of the present application.

[0071] As shown in FIG1 , battery 100 includes a housing 110, an electrode assembly 120, and an end cap assembly 130. Housing 110 and end cap assembly 130 form an outer shell or battery case. Housing 110 can be formed of a metal (e.g., aluminum). The shape of housing 110 depends on the shape of one or more electrode assemblies 120 combined. For example, housing 110 can be a hollow cylinder as shown in FIG1 .

[0072] The housing 110 has an opening, and the electrode assembly 120 is accommodated in the housing 110. 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 accommodate and protect the electrode assembly 120 and other components. The housing 110 is filled with an electrolyte, i.e., an electrolyte solution.

[0073] In the battery 100 provided in the embodiment of the present application, the electrode assembly 120 may be provided as a single one or multiple ones according to actual usage requirements. For example, in the embodiment shown in FIG1 , one electrode assembly 120 is provided in the battery 100 .

[0074] Continuing with FIG1 , the end cap assembly 130 includes a negative terminal cap 1301 and a positive terminal cap 1302. The negative terminal cap 1301 and the positive terminal cap 1302 respectively cover the opening of the housing 110 from both ends of the housing 110 to cover the electrode assembly 120 within the housing 110. A negative electrode terminal is provided on the negative terminal cap 1301, and a positive electrode terminal is provided on the positive terminal cap 1302. The electrode assembly 120 is provided with a tab 121, wherein the positive electrode terminal is electrically connected to the positive tab of the electrode assembly 120, and the negative electrode terminal is electrically connected to the negative tab of the electrode assembly 120.

[0075] In addition to the electrode terminals, the negative end cap 1301 or the positive end cap 1302 is also provided with a liquid injection port 1312. For example, in the embodiment shown in FIG1 , the liquid injection port 1312 may be provided at the center of the negative end cap 1301. During the liquid injection process of the battery 100, an external liquid injection tool may be placed at the liquid injection port 1312 to inject electrolyte into the battery 100.

[0076] It should be noted that in the battery 100 provided in the embodiment of the present application, in addition to the electrode terminals and the liquid injection port, 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.

[0077] In addition, the battery 100 shown in FIG1 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. In the square battery, its components may be similar to the battery 100 shown in FIG1 above, and the shell of the square battery may be a hollow square shell.

[0078] FIG2 is a schematic three-dimensional diagram showing the cooperation between a battery liquid filling detection device 200 and a liquid filling member 300 provided in an embodiment of the present application.

[0079] As shown in Figure 2, in an embodiment of the present application, the liquid injection detection device 200 can be applied to the liquid injection part 300 of the battery, and the liquid injection part 300 is configured to move along a preset moving path P. The liquid injection detection device 200 includes: a first sensor 210, which can be set toward the end of the liquid injection part 300 and located in the preset moving path P. The first sensor 210 can be used to detect the movement of the end of the liquid injection part 300 to detect whether the end of the liquid injection part 300 is intact.

[0080] Specifically, in the embodiment of the present application, the injection member 300 is an injection device for injecting electrolyte into a battery. The battery may be the battery 100 shown in FIG1 above. The battery 100 may be provided with an injection port 1312. The injection member 300 may pass through the injection port 1312 to enter the interior of the battery 100, thereby injecting electrolyte into the interior of the battery 100. Alternatively, in some embodiments, the injection member 300 may be in the form of a structure such as an injection needle or an injection tube.

[0081] The end of the injection member 300 detected by the injection detection device 200 is the end of the injection member 300 facing the battery 100. In some specific designs, when the injection member 300 includes an injection needle, the end of the injection member 300 detected by the injection detection device 200 is the needle tip of the injection needle, which can be designed as a pointed tip. If a seal or other structural member is provided at the injection port 1312 of the battery 100, the needle tip of the injection needle can easily pierce the seal and enter the interior of the battery 100.

[0082] In the embodiment of the present application, the end of the liquid injection piece 300 can be inspected using the liquid injection detection device 200 before or after the liquid injection piece 300 injects liquid into the battery 100. During the inspection process, a preset movement path P can be designed for the end of the liquid injection piece 300, and the first sensor 210 in the liquid injection detection device 200 can be located in the preset movement path P to detect the integrity of the end of the liquid injection piece 300. Optionally, as shown in FIG2 , the preset movement path P can be a linear movement path. Alternatively, in other embodiments, the preset movement path can also be a curved path or other types of paths.

[0083] As an example, in some specific implementations, the first sensor 210 may be correspondingly arranged below the liquid injection piece 300 , and the liquid injection piece 300 moves toward the first sensor 210 along a preset moving path P in the vertical direction.

[0084] Optionally, the preset moving path P may be located in the axial direction of the liquid injection member 300 . In other words, the liquid injection member 300 may move along the preset moving path P in its axial direction.

[0085] Optionally, in some embodiments, the first sensor 210 can be set at the end point of the preset moving path P. The first sensor 210 can be used to detect whether the end of the injection piece 300 is in contact with it, thereby detecting whether the end of the injection piece 300 is intact.

[0086] Alternatively, in other embodiments, the first sensor 210 can be set downstream of the preset moving path P. When the injection part 300 moves in the preset moving path P, it can drive the first sensor 210 to move. The first sensor 210 can detect the moving stroke of the end of the injection part 300, thereby detecting whether the end of the injection part 300 is complete.

[0087] Through the technical solution of the embodiment of the present application, a liquid injection detection device 200 is provided for the liquid injection part 300 of the battery. The first sensor 210 in the liquid injection detection device 200 can be used to detect the integrity of the end of the liquid injection part 300, thereby reducing the impact of the missing end of the liquid injection part 300 on the liquid injection process of the battery, for example, reducing the possibility of the liquid injection part 300 being unable to enter the interior of the battery, and / or reducing the impact of impurity particles dropped by the missing liquid injection part 300 on the battery, thereby improving the manufacturing performance of the battery during the liquid injection process and the reliability of the battery.

[0088] FIG3 shows another schematic stereoscopic diagram of the liquid injection detection device 200 and the liquid injection piece 300 provided in an embodiment of the present application cooperating with each other.

[0089] As shown in FIG3 , in an embodiment of the present application, the liquid injection detection device 200 may include a second sensor 220 having a detection channel 221 formed therein corresponding to the liquid injection member 300. The detection channel 221 is located within a predetermined movement path P and is configured to pass through the liquid injection member 300 to detect whether the liquid injection member 300 is skewed. For example, if the liquid injection member 300 includes a liquid injection needle, the detection channel 221 in the second sensor 220 may be configured to detect whether the needle tip of the liquid injection needle is skewed.

[0090] Alternatively, in the example shown in FIG3 , the preset movement path P may be located in the axial direction of the liquid injection piece 300, with the preset movement path P extending in the same direction as the axial direction of the liquid injection piece 300. The second sensor 220 is also located in the axial direction of the liquid injection piece 300, and a detection channel 221 is formed in the second sensor 220, through which the preset movement path P may pass. When the end of the liquid injection piece 300 passes through the detection channel 221 of the second sensor 220 along the preset movement path P, the second sensor 220 can detect whether the end of the liquid injection piece 300 is skewed.

[0091] In some embodiments, the detection channel 221 in the second sensor 220 may be coaxially disposed with the liquid injection member 300. The preset moving path P may be coaxial with the central axis of the detection channel 221 and the liquid injection member 300.

[0092] Optionally, the detection channel 221 in the second sensor 220 can be used to sense the shape of the end of the injection piece 300, thereby detecting whether the end of the injection piece 300 is skewed. As an example, the second sensor 220 can be a contact sensor. When the injection piece 300 includes an injection needle, if the needle tip of the injection needle is skewed, the needle tip of the injection needle can contact the detection channel 221 in the second sensor 220.

[0093] Through the technical solution of the embodiment of the present application, the second sensor 220 in the liquid filling detection device 200 can be used to detect whether the end of the liquid filling part 300 is skewed, thereby reducing the impact of the end of the liquid filling part 300 on the liquid filling process of the battery 100 when it is skewed. For example, it reduces the possibility of the skewed liquid filling part 300 being punctured and thus piercing other parts of the battery except the liquid filling port, thereby improving the manufacturing performance of the battery during the liquid filling process and the reliability of the battery.

[0094] FIG4 shows another schematic stereoscopic diagram of the liquid injection detection device 200 and the liquid injection piece 300 provided in an embodiment of the present application cooperating with each other.

[0095] As shown in FIG4 , in an embodiment of the present application, the liquid injection detection device 200 may include a first sensor 210 and a second sensor 220. Both the first sensor 210 and the second sensor 220 are disposed in a pre-designed movement path P for the end portion of the liquid injection member 300. Furthermore, in the pre-designed movement path P, the second sensor 220 is disposed upstream of the first sensor 210, and the liquid injection member 300 is configured to pass through a detection channel 221 in the second sensor 220 and then move toward the first sensor 210.

[0096] Specifically, in this embodiment, the second sensor 220 is arranged upstream of the first sensor 210, and the detection channel 221 therein will not affect the movement of the injection piece 300 in the preset moving path P while detecting the skewness of the end of the injection piece 300. The injection piece 300 can reach the first sensor 210 after passing through the detection channel 221 in the second sensor 220, so that the first sensor 210 can detect the integrity of the end of the injection piece 300.

[0097] Optionally, a certain gap may be provided between the second sensor 220 and the first sensor 210 to reduce possible mutual interference between the first sensor 210 and the second sensor 220 .

[0098] Optionally, the second sensor 220 and the first sensor 210 can be fixed by the same fixing device so that the relative position relationship between the second sensor 220 and the first sensor 210 is fixed. The two sensors can not only perform more accurate detection of the injection part 300, but can also move simultaneously in the battery production line, so as to facilitate repeated detection of the injection part 300 and improve the battery injection efficiency.

[0099] Through the technical solution of the embodiment of the present application, a first sensor 210 and a second sensor 220 are simultaneously provided in the liquid filling detection device 200. The first sensor 210 can be used to detect whether the end of the liquid filling part 300 is intact, and the second sensor 220 can be used to detect whether the end of the liquid filling part 300 is skewed, thereby improving the comprehensiveness of the detection of the liquid filling part 300, greatly reducing the impact of abnormal conditions at the end of the liquid filling part 300 on the liquid filling process of the battery 100, and improving the manufacturing performance of the battery 100 during the liquid filling process.

[0100] Furthermore, the second sensor 220 is arranged upstream of the first sensor 210, and the relative position relationship between the two is designed to be relatively compact and reasonable. While being able to provide integrity and skewness detection for the injection part 300 at the same time, the two sensors do not need to occupy much equipment space.

[0101] As an example, as shown in FIG. 4 , the liquid injection detection device 200 further includes a receiving cavity 230 . The first sensor 210 may be disposed inside the receiving cavity 230 , and the second sensor 220 may cover the receiving cavity 230 .

[0102] Specifically, the liquid injection detection device 200 may include a housing having a hollow structure formed therein to form the accommodating chamber 230. In the example shown in FIG4 , the height of the accommodating chamber 230 is slightly higher than the first sensor 210, and the first sensor 210 may be disposed at the bottom of the accommodating chamber 230 such that a certain gap exists between the second sensor 220 covering the accommodating chamber 230 and the first sensor 210.

[0103] FIG4 is merely for illustration, and the accommodating cavity 230 shown is a cylindrical structure. In other alternative embodiments, the accommodating cavity 230 may also be of other structural shapes, which is not specifically limited in the embodiment of the present application.

[0104] In addition, Figures 2 to 4 above are for illustration only, and the first sensor 210 shown is a long columnar structure, and the second sensor 220 is a plate-like structure. In other alternative embodiments, the first sensor 210 and the second sensor 220 may also be other structural shapes, and the embodiments of the present application do not make specific limitations on this.

[0105] Through the technical solution of the embodiment of the present application, a accommodating chamber 230 is set in the liquid injection detection device 200. The accommodating chamber 230 can make the first sensor 210 and the second sensor 220 compactly and relatively stably arranged together, and the second sensor 220 is located upstream of the first sensor 210. The first sensor 210 and the second sensor 220 can effectively and compactly perform integrity and skewness detection on the liquid injection part 300.

[0106] It is understood that, in addition to assembling the first sensor 210 and the second sensor 220 together through the accommodating cavity 230 as shown in FIG4 , in other alternative examples, the first sensor 210 and the second sensor 220 may also be assembled together through other fixing methods to fix the relative positional relationship between the two. This embodiment of the present application is not specifically limited to this.

[0107] Optionally, in each of the above embodiments, the preset moving path P of the liquid injection member 300 is the same as the liquid injection moving path of the liquid injection member 300 when injecting liquid into the battery 100 .

[0108] Specifically, in the battery production line, the battery 100 and the liquid injection detection device 200 can be in a mobile state. The battery 100 and the liquid injection detection device 200 can be moved to the position corresponding to the liquid injection part 300 in a time-sharing manner according to actual needs, so that the liquid injection part 300 can inject liquid into the battery 100 or the liquid injection detection device 200 can detect the liquid injection part 300.

[0109] When the liquid injection member 300 is injecting liquid into the battery 100, the battery 100 can be moved to a target position corresponding to the liquid injection member 300, for example, the battery 100 can be moved directly below the liquid injection member 300. After the liquid injection member 300 moves along the preset movement path P, the liquid injection member 300 can enter the interior of the battery 100 through the liquid injection port 1312 of the battery 100, and the liquid injection device can inject electrolyte into the interior of the battery 100 through the liquid injection member 300.

[0110] Before or after the liquid injection unit 300 injects liquid into the battery 100, the liquid injection detection device 200 can be moved to a target position, which is the same as the position of the battery 100 during the liquid injection process. The liquid injection unit 300 moves again along the preset movement path P. The first sensor 210 in the liquid injection detection device 200 performs an end integrity test on the liquid injection unit 300, and the second sensor 220 in the liquid injection detection device 200 performs an end skew test on the liquid injection unit 300.

[0111] Through the technical solutions of the embodiments of the present application, the liquid injection member 300 can have only one movement path to complete the liquid injection of the liquid injection member 300 into the battery 100 and the detection of the liquid injection member 300 by the liquid injection detection device 200. The control method of the liquid injection member 300 is relatively simple and easy to implement. In addition, the liquid injection process and the detection process of the liquid injection member 300 use the same movement path, which can facilitate the adaptive adjustment of the position of the first sensor 210 and / or the second sensor 220 in the liquid injection detection device 200 according to the different sizes and shapes of the battery 100. This conveniently enables the liquid injection member 300 to not only inject liquid into batteries 100 of various sizes and shapes, but also to use the liquid injection detection device 200 to detect the liquid injection member 300.

[0112] In conjunction with the embodiments shown in FIG. 2 and FIG. 4 , regarding the detection process of the first sensor 210 in the liquid injection detection device 200, in some embodiments, the first sensor 210 is disposed at an end point of a preset movement path P of the liquid injection piece 300. The first sensor 210 can be used to detect whether the end of the liquid injection piece 300 contacts the first sensor 210. When the end of the liquid injection piece 300 contacts the first sensor 210, the first sensor 210 is used to detect that the end of the liquid injection piece 300 is intact; when the end of the liquid injection piece 300 does not contact the first sensor 210, the first sensor 210 is used to detect that the end of the liquid injection piece 300 is missing.

[0113] In this embodiment, the first sensor 210 may be disposed at the end point of a preset movement path P, and the initial position of the injection piece 300 may be disposed at the starting point of the preset movement path P. When the end of the injection piece 300 moves the length of the preset movement path P and the end of the injection piece 300 is intact, it may just contact the first sensor 210, allowing the first sensor 210 to detect a contact signal from the end of the injection piece 300, thereby detecting that the end of the injection piece 300 is intact. Conversely, if the end of the injection piece 300 is missing, even if the end of the injection piece 300 moves the length of the preset movement path P, the end of the injection piece 300 cannot contact the first sensor 210, and the first sensor 210 cannot detect a contact signal from the end of the injection piece 300, thereby detecting that the end of the injection piece 300 is missing.

[0114] Through the technical solution of this embodiment, the first sensor 210 can effectively and reliably detect the integrity of the end of the liquid injection piece 300 by detecting contact with the end of the liquid injection piece 300. Furthermore, the structure of the first sensor 210 is easy to implement and highly reliable, which helps reduce the cost of the liquid injection detection device 200 and thus the production line cost of the battery 100.

[0115] In other embodiments, the first sensor 210 may also be disposed downstream of the preset movement path P of the liquid injection piece 300. The first sensor 210 may be used to detect the movement stroke of the end portion of the liquid injection piece 300. When the movement stroke of the end portion of the liquid injection piece 300 is greater than or equal to a preset threshold, the first sensor 210 is used to detect that the end portion of the liquid injection piece 300 is intact; when the movement stroke of the end portion of the liquid injection piece 300 is less than the preset threshold, the first sensor 210 is used to detect that the end portion of the liquid injection piece 300 is missing.

[0116] In this embodiment, the first sensor 210 is not fixed and can be displaced by the injection member 300. For example, the first sensor 210 can be mounted on a fixed platform via an elastic member that can elastically deform along a predetermined movement path P. When the end of the injection member 300 contacts the first sensor 210, the end of the injection member 300 has not yet reached the end of the predetermined movement path P, and the injection member 300 can continue to move along the predetermined movement path P. In this case, the injection member 300 can drive the first sensor 210 to move along the predetermined movement path P.

[0117] The first sensor 210 can detect the movement of the injection piece 300 after contacting the first sensor 210. When the end of the injection piece 300 is intact, the first sensor 210 can detect a greater movement of the end of the injection piece 300. When the end of the injection piece 300 is missing, the first sensor 210 can detect a smaller movement of the end of the injection piece 300. In actual application, the first sensor 210 can determine whether the end of the injection piece 300 is intact by determining whether the movement of the end of the injection piece 300 is greater than a certain preset threshold. Specifically, the preset threshold can be designed based on the length of the preset movement path P and the specific position of the first sensor 210 within the preset movement path P. The present embodiment does not specifically limit this preset threshold.

[0118] Optionally, in this embodiment, the first sensor 210 can not only detect the integrity of the end of the injection piece 300, but can also further detect the extent of the end missing of the injection piece 300 based on the travel distance of the end of the injection piece 300. For example, if the end of the injection piece 300 is intact, the travel distance of the end of the injection piece 300 detected by the first sensor 210 is equal to a preset threshold. If the end of the injection piece 300 is missing, the missing length of the end of the injection piece 300 is the difference between the preset threshold and the actual travel distance detected.

[0119] Through the technical solution of this embodiment, the first sensor 210 can effectively and reliably detect the integrity of the end of the liquid injection piece 300 by detecting the travel of the end of the liquid injection piece 300. Furthermore, the first sensor 210 can further detect the degree of end missingness of the liquid injection piece 300, thereby providing a more comprehensive detection function for the liquid injection piece 300.

[0120] In conjunction with the embodiments shown in Figures 3 and 4 above, regarding the detection process of the second sensor 220 in the liquid injection detection device 200, in some embodiments, the detection channel 221 in the second sensor 220 can be used to detect whether the liquid injection piece 300 contacts the inner circumference of the detection channel 221. If the end of the liquid injection piece 300 contacts the inner circumference of the detection channel 221 in the second sensor 220, it can be detected that the end of the liquid injection piece 300 is skewed; if the end of the liquid injection piece 300 does not contact the inner circumference of the detection channel 221, it can be detected that the end of the liquid injection piece 300 is not skewed.

[0121] In a specific implementation, the size of the detection channel 221 in the second sensor 220 can be designed based on the skew requirements of the injection piece 300 during the actual injection process. If the end of the injection piece 300 is highly skewed, when the end of the injection piece 300 passes through the detection channel 221, the end will contact the inner circumference of the detection channel 221, allowing the second sensor 220 to detect a contact signal from the end, thereby determining that the end is skewed. Conversely, if the end of the injection piece 300 is less skewed or not skewed, the end of the injection piece 300 can smoothly pass through the detection channel 221 without contacting the inner circumference of the detection channel 221. The second sensor 220 cannot detect the contact signal from the end, thereby determining that the end is not skewed.

[0122] Alternatively, the end portion skew of the injection piece 300 may be skewed relative to the axial direction of the injection piece 300. For example, when the injection piece 300 includes an injection needle, the needle tip skew may be skewed relative to the axial direction of the injection needle.

[0123] Through the technical solution of this embodiment, the second sensor 220 can effectively and reliably detect skewness of the end of the liquid injection piece 300 by detecting contact with the end of the liquid injection piece 300. Furthermore, the structure of the second sensor 220 is easy to implement and highly reliable, which helps reduce the cost of the liquid injection detection device 200 and thus the production cost of the battery 100.

[0124] FIG5 shows another schematic stereoscopic diagram of the liquid injection detection device 200 and the liquid injection piece 300 provided in an embodiment of the present application cooperating with each other.

[0125] As shown in Figure 5, in an embodiment of the present application, the liquid injection detection device 200 also includes: a processing module 240, which is electrically connected to the first sensor 210 and / or the second sensor 220, and the processing module 240 is used to receive the detection signal of the first sensor 210 and / or the second sensor 220; and / or, control the first sensor 210 and / or the second sensor 220 to perform detection.

[0126] Specifically, the processing module 240 can be an electrical module with data processing and / or control functions, such as a controller or processor. The first sensor 210 and / or the second sensor 220 transmits a detection signal obtained by the first sensor 210 and / or the second sensor 220 to the processing module 240, which can control the injection member 300 to continue the subsequent injection process based on the detection signal.

[0127] In addition, the processing module 240 can also control whether the first sensor 210 and the second sensor 220 begin to perform detection on the liquid injection piece 300. As an example, the processing module 240 can simultaneously control the liquid injection piece 300 to begin moving along the preset movement path P and control the first sensor 210 and / or the second sensor 220 to begin detection, thereby improving the effectiveness of the detection of the liquid injection piece 300. In this embodiment, the first sensor 210 and / or the second sensor 220 do not need to be in an active state, which helps reduce the power consumption required during the detection of the liquid injection piece 300.

[0128] Through the technical solutions of the embodiments of the present application, a processing module 240 is provided in the liquid injection detection device 200. This processing module 240 can process the detection signals of the first sensor 210 and / or the second sensor 220, thereby effectively monitoring the detection process of the liquid injection component 300. In addition, the processing module 240 can also control the operation of the first sensor 210 and / or the second sensor 220, which helps reduce the power consumption required during the detection process of the liquid injection component 300.

[0129] 5 , the related technical solutions of the first sensor 210 , the second sensor 220 and the accommodating cavity 230 in the liquid injection detection device 200 may be the same as the technical solutions of any of the embodiments shown in FIG. 2 to FIG. 4 above.

[0130] Specifically, the first sensor 210 is arranged inside the accommodating cavity 230, the second sensor 220 covers the accommodating cavity 230, the second sensor 220 is arranged upstream of the first sensor 210, and the injection part 300 is configured to move toward the first sensor 210 after passing through the detection channel 221 in the second sensor 220.

[0131] Optionally, both the first sensor 210 and the second sensor 220 may be contact sensors. In the initial state, the liquid injection member 300 may be positioned at the starting point of a preset movement path P, and the first sensor 210 may be positioned at the end point of the preset movement path P. The preset movement path P may pass through the detection channel 221 of the second sensor 220.

[0132] For the first sensor 210, when the end of the liquid injection piece 300 contacts the first sensor 210, the first sensor 210 is used to detect that the end of the liquid injection piece 300 is intact; when the end of the liquid injection piece 300 does not contact the first sensor 210, the first sensor 210 is used to detect that the end of the liquid injection piece 300 is missing.

[0133] For the second sensor 220, when the end of the injection piece 300 contacts the inner circumference of the detection channel 221 in the second sensor 220, it can be detected that the end of the injection piece 300 is skewed; when the end of the injection piece 300 does not contact the inner circumference of the detection channel 221, it can be detected that the end of the injection piece 300 is not skewed.

[0134] Optionally, in some implementations of the above application embodiments, the diameter D1 of the liquid injection piece 300 and the diameter D2 of the detection channel 221 in the second sensor 220 satisfy: 0<(D2-D1) / D1≤0.15.

[0135] Specifically, in this embodiment, the diameter D2 of the detection channel 221 is larger than the diameter D1 of the liquid injection piece 300 , ie, D2 - D1 > 0, so that the liquid injection piece 300 can smoothly pass through the detection channel 221 .

[0136] Furthermore, the difference (D2-D1) between the diameter D2 of the detection channel 221 and the diameter D1 of the injection part 300 also satisfies (D2-D1) / D1≤0.15. In this case, the difference between the diameter D2 of the detection channel 221 and the diameter D1 of the injection part 300 can be smaller, so that the detection channel 221 can play a more accurate detection role on the injection part 300, that is, when the end of the injection part 300 has a certain degree of skewness, the end of the skewed injection part 300 will contact the inner circumferential surface of the detection channel 221.

[0137] In the technical solution of this embodiment, by designing the diameter D1 of the liquid injection part and the diameter D2 of the detection channel 221 in the second sensor 220, the second sensor 220 can effectively detect the skewness of the end of the liquid injection part 300, thereby further improving the detection performance of the liquid injection detection device 200 for the liquid injection part 300.

[0138] Optionally, in some implementations of the above application embodiments, the first sensor 210 is configured to be able to move along an extension direction of a preset moving path P.

[0139] Specifically, in this embodiment, when the liquid injection piece 300 is in a stationary state (or an initial state), the distance between the first sensor 210 and the liquid injection piece 300 is adjustable.

[0140] As an example, when the first sensor 210 is disposed in the accommodating chamber 230, the first sensor 210 is not fixed in the accommodating chamber 230. Instead, an adjustment module may be provided between an end of the first sensor 210 facing the bottom of the accommodating chamber 230 and the bottom of the accommodating chamber 230. By adjusting the height of the adjustment module, the distance between the first sensor 210 and the liquid injection member 300 can be adjusted, and the first sensor 210 can be moved in the sensor accommodating chamber 230 along the extension direction of the preset movement path P.

[0141] Through the technical solution of this embodiment, the initial distance between the first sensor 210 and the liquid injection piece 300 is adjustable and can be designed based on the distance between the liquid injection piece 300 and the battery 100. When the model or external dimensions of the battery 100 change, the injection movement path of the liquid injection piece 300 will also change synchronously. To adapt to the injection movement path of the liquid injection piece 300, the initial distance between the first sensor 210 and the liquid injection piece 300 and the preset movement path P during the detection process will also change synchronously, enabling the first sensor 210 to be applied to the detection of liquid injection pieces 300 of batteries 100 of various models or external dimensions.

[0142] By way of example and not limitation, the first sensor 210 can move a distance between 0 and 50 mm in the direction extending along the preset movement path P. This range of movement distances is adaptable to the sizes of most batteries in the related art. Therefore, the first sensor 210 provided in the embodiment of the present application can be applied to the liquid injection parts of most batteries in the related art, facilitating the promotion and use of the liquid injection detection device 200 in battery production lines.

[0143] In the above application embodiments, before the liquid injection member 300 injects liquid into the battery 100 and / or after the liquid injection member 300 injects liquid into the battery 100, the liquid injection detection device 200 can be used to detect the liquid injection member.

[0144] Specifically, the liquid injection detection device 200 can be used to first detect the liquid injection piece 300 of the battery 100. If the integrity and / or skewness of the liquid injection piece 300 meet the requirements, the liquid injection piece 300 can be used to inject liquid into the battery 100. In this embodiment, the impact of a missing and / or skewed liquid injection piece 300 on the current liquid injection of the battery 100 can be reduced, thereby improving the liquid injection performance of the battery 100.

[0145] Alternatively, after the current battery 100 is injected with liquid using the injection piece 300 , the injection detection device 200 can be used to detect the integrity and / or skewness of the injection piece 300 after injection, so that the injection piece 300 can be used to inject liquid into the next battery.

[0146] The technical solution of this embodiment is conducive to the liquid injection component 300 to continuously inject liquid into multiple batteries 100 in a battery production line, thereby improving the liquid injection reliability of the liquid injection component 300 into each battery 100.

[0147] The battery liquid filling detection device provided by the present application is described above with reference to Figures 2 to 5 . The battery liquid filling detection method provided by the present application is described below with reference to Figures 6 and 7 . It is understood that the relevant technical solutions of the liquid filling detection method in the following embodiments may correspond to the relevant technical solutions of the liquid filling detection device in the above embodiments. For specific details, please refer to the relevant description of the above embodiments and will not be elaborated on below.

[0148] Figure 6 shows a schematic flow chart of a battery liquid filling detection method 10 provided in an embodiment of the present application. The battery liquid filling detection method 10 can be applied to a battery liquid filling member, which can be, for example, the liquid filling member 300 in any of the above embodiments.

[0149] As shown in FIG6 , the battery liquid filling detection method 10 may include the following steps.

[0150] S101: Controlling a liquid injection component of a battery to move along a preset moving path, wherein a first sensor is provided in the preset moving path.

[0151] S102: Using a first sensor to detect the movement of the end portion of the liquid injection piece to detect whether the end portion of the liquid injection piece is intact.

[0152] Specifically, the execution entity of the liquid injection detection method 10 provided in the embodiment of the present application can be a control device in a battery production line, which may include multiple discrete control components. For example, in step S101, the first control component can control the movement of the liquid injection component, and in step S102, the second control component can control the operation of the first sensor.

[0153] In the embodiment of the present application, the liquid injection detection method 10 can be applied to the liquid injection component 300 in any of the above embodiments.

[0154] In step S101, a preset moving path P can be designed for the liquid injection part 300, and the first control component can control the liquid injection part 300 to move along the preset moving path P. The first sensor in the preset moving path P can be the first sensor 210 in the liquid injection detection device 200 in any of the above embodiments.

[0155] In step S102, the second control component can use the first sensor 210 to detect the movement of the end of the injection piece 300 to detect whether the end is intact. Specifically, the relevant technical solutions of the first sensor 210 for detecting the integrity of the end of the injection piece 300 can be referred to the relevant description of any of the above embodiments.

[0156] FIG7 shows another schematic flow chart of a battery liquid filling detection method 10 provided in an embodiment of the present application, based on the embodiment shown in FIG6 above. In this liquid filling detection method 10, a second sensor is further provided in the preset movement path designed for the liquid filling member, and a detection channel is formed in the second sensor for passing the liquid filling member.

[0157] As shown in FIG7 , the liquid injection detection method 10 may further include:

[0158] S103: Utilize the detection channel in the second sensor to detect whether the end of the liquid injection piece is skewed.

[0159] Optionally, the execution entity of step S103 may be the same as or different from the execution entity of step S102. In some examples, the execution entity of step S103 and step S102 may be the processing module 240 in the embodiment shown in FIG5 .

[0160] In step S103, the second sensor may be the second sensor 220 in the liquid injection detection device 200 of any of the above embodiments, wherein the second sensor 220 is formed with a detection channel 221 for passing the liquid injection piece 300. The technical solution for the second sensor 220 detecting the skewness of the end portion of the liquid injection piece 300 through the detection channel 221 can be found in the relevant description of any of the above embodiments.

[0161] Optionally, in some embodiments, in the preset moving path P, the second sensor 220 is arranged upstream of the first sensor 210. In this case, the above step S101 may include: controlling the injection part 300 to move toward the first sensor 210 after passing through the detection channel 221 in the second sensor 220 along the preset moving path P.

[0162] Optionally, in some embodiments, the preset moving path P is the same as the injection moving path of the injection member 300 when injecting liquid into the battery.

[0163] The present invention also provides a battery liquid injection system. As shown in FIG8 , the battery liquid injection system 1 may include a liquid injection component 300 and a liquid injection detection device 200 .

[0164] Specifically, the liquid injection detection device 200 can be configured to correspond to the liquid injection piece 300 , and the first sensor 210 and / or the second sensor 220 in the liquid injection detection device 200 can be used to detect the end integrity and / or skewness of the liquid injection piece 300 .

[0165] Optionally, as shown in FIG8 , the battery injection system 1 may further include an injection device 400, which is connected to the injection member 300 and is used to inject electrolyte into the interior of the battery 100 through the injection member 300. Specifically, the injection device 400 can be understood as an electrolyte supply device, which is connected to the injection member 300. The injection member 300 has an injection channel formed therein, and the electrolyte in the injection device 400 flows into the interior of the battery through the injection channel in the injection member 300. Optionally, a switch may be provided at the connection between the injection device 400 and the injection member 300. When the switch is turned on, the injection device and the injection channel in the injection member 300 are connected to each other. When the switch is turned off, the injection device and the injection channel in the injection member 300 are disconnected from each other.

[0166] It can be understood that the battery filling system 1, in addition to the various filling devices shown in Figure 8, can further include other auxiliary equipment, for example, multiple control devices for controlling the filling detection device 200, the filling part 300 and the filling device 400, etc.

[0167] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A battery filling detection device, characterized in that: A liquid injection piece (300) applied to the battery, the liquid injection piece (300) being configured to move along a preset moving path (P), and the liquid injection detection device comprising: A first sensor (210) is arranged toward the end of the liquid injection piece (300) and is located in the preset moving path (P), and the first sensor (210) is used to detect the movement of the end of the liquid injection piece (300) to detect whether the end of the liquid injection piece (300) is intact.

2. The liquid injection detection device according to claim 1, characterized in that: The liquid injection detection device also includes: A second sensor (220), wherein a detection channel corresponding to the liquid injection piece (300) is formed in the second sensor (220), the detection channel is located in the preset moving path (P), and the detection channel is used to pass through the liquid injection piece (300) to detect whether the liquid injection piece (300) is skewed.

3. The liquid injection detection device according to claim 2, characterized in that: In the preset moving path (P), the second sensor (220) is arranged upstream of the first sensor (210), and the liquid injection piece (300) is configured to move toward the first sensor (210) after passing through the detection channel in the second sensor (220).

4. The liquid injection detection device according to claim 3, characterized in that: The liquid injection detection device further comprises: a containing cavity (230), the first sensor (210) being arranged inside the containing cavity (230), and the second sensor (220) covering the containing cavity (230).

5. The liquid injection detection device according to any one of claims 1 to 4, characterized in that: The preset moving path (P) is the same as the liquid injection moving path when the liquid injection member (300) injects liquid into the battery.

6. The liquid injection detection device according to any one of claims 1 to 4, characterized in that: The first sensor (210) is arranged at an end point of a preset moving path (P) of the liquid injection piece (300) and is used to detect whether an end of the liquid injection piece (300) contacts the first sensor (210); When the end of the liquid injection piece (300) contacts the first sensor (210), the first sensor (210) is used to detect whether the end of the liquid injection piece (300) is intact; When the end of the liquid injection piece (300) does not contact the first sensor (210), the first sensor (210) is used to detect the missing end of the liquid injection piece (300).

7. The liquid injection detection device according to any one of claims 1 to 4, characterized in that: The first sensor (210) is arranged downstream of a preset moving path (P) of the liquid injection piece (300) and is used to detect the moving stroke of the end of the liquid injection piece (300); When the movement stroke of the end of the liquid injection piece (300) is greater than or equal to a preset threshold, the first sensor (210) is used to detect whether the end of the liquid injection piece (300) is intact; When the movement stroke of the end of the liquid injection piece (300) is less than the preset threshold, the first sensor (210) is used to detect the missing end of the liquid injection piece (300).

8. The liquid injection detection device according to any one of claims 2 to 4, characterized in that: The detection channel in the second sensor (220) is used to detect whether the liquid injection piece (300) contacts the inner peripheral surface of the detection channel; When the liquid injection piece (300) contacts the inner peripheral surface of the detection channel, the second sensor (220) is used to detect whether the liquid injection piece (300) is skewed; When the liquid injection piece (300) does not contact the inner circumferential surface of the detection channel, the second sensor (220) is used to detect that the liquid injection piece (300) is not skewed.

9. The liquid injection detection device according to any one of claims 2 to 4, characterized in that: The liquid injection detection device also includes: a processing module (240), the processing module (240) is electrically connected to the first sensor (210) and the second sensor (220), and the processing module (240) is used to receive detection signals from the first sensor (210) and the second sensor (220) and / or control the first sensor (210) and the second sensor (220) to perform detection.

10. The liquid injection detection device according to any one of claims 2 to 4, characterized in that: The diameter D1 of the liquid injection part (300) and the diameter D2 of the detection channel in the second sensor (220) satisfy the following relationship: 0<(D2-D1) / D1≤0.

15.

11. The liquid injection detection device according to any one of claims 1 to 4, characterized in that: The first sensor (210) is configured to be movable along an extension direction of the preset moving path (P).

12. The liquid injection detection device according to claim 11, characterized in that: The moving distance of the first sensor (210) in the extension direction of the preset moving path (P) is between 0 and 50 mm.

13. The liquid injection detection device according to any one of claims 1 to 4, characterized in that: Before the liquid injection piece (300) injects liquid into the battery and / or after the liquid injection piece (300) injects liquid into the battery, the liquid injection detection device is used to detect the liquid injection piece (300).

14. A battery filling detection method, characterized in that: Applied to the liquid injection part of the battery, the liquid injection detection method comprises: Controlling the liquid injection part of the battery to move along a preset moving path, wherein a first sensor is arranged in the preset moving path; The first sensor is used to detect the movement of the end of the injection piece to detect whether the end of the injection piece is complete.

15. The liquid injection detection method according to claim 14, characterized in that: A second sensor is also provided in the preset moving path, and a detection channel for passing the liquid injection piece is formed in the second sensor; The liquid injection detection method also includes: The detection channel in the second sensor is used to detect whether the end of the liquid injection piece is skewed.

16. The liquid injection detection method according to claim 15, characterized in that: In the preset moving path, the second sensor is arranged upstream of the first sensor; The controlling the liquid injection member of the battery to move along a preset moving path comprises: The liquid injection piece is controlled to move toward the first sensor after passing through the detection channel in the second sensor along the preset moving path.

17. The liquid injection detection method according to any one of claims 14 to 16, characterized in that: The preset moving path is the same as the injection moving path when the injection member injects liquid into the battery.

18. A battery injection system, characterized in that: include: Injection parts and The liquid injection detection device according to any one of claims 1 to 13, wherein the liquid injection detection device is used to detect the liquid injection part.

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