Liquid injection equipment and battery production line

Abstract

The utility model provides liquid injection equipment and a battery production line. The liquid injection equipment comprises a main body part, a limiting piece, a conveying piece, a liquid injection piece and a first detection piece. The body portion includes a first wall. The limiting piece is arranged on the first wall. The conveying part is used for bearing the single battery and has a first working state in contact with the limiting part; and the liquid injection part is configured to inject liquid into the battery monomers borne by the conveying part in the first working state. The first detection part is arranged on the conveying part and is configured to detect the distance between the conveying part and the first wall in the first direction when the conveying part is in the first working state, and the first direction is parallel to the thickness direction of the first wall. According to the scheme, the reliability of the battery is improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and in particular to a liquid injection device and a battery production line. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] In the development of battery technology, how to improve battery reliability is a technical problem that needs to be solved urgently. Utility Model Content

[0004] The present application provides a liquid injection device and a battery production line, which can improve the reliability of the battery.

[0005] This application is achieved through the following technical solutions:

[0006] In a first aspect, the present application provides a liquid injection device for injecting electrolyte into a battery cell. The liquid injection device includes a main body, a limiter, a conveying member, a liquid injection member and a first detection member. The main body includes a first wall. The limiter is arranged on the first wall. The conveying member is used to carry the battery cell, and the conveying member has a first working state in contact with the limiter. The liquid injection member is configured to inject liquid into the battery cell carried by the conveying member in the first working state. The first detection member is arranged on the conveying member, and the first detection member is configured to detect the distance between the conveying member and the first wall in a first direction when the conveying member is in the first working state, and the first direction is parallel to the thickness direction of the first wall.

[0007] In the technical solution of the embodiment of the present application, the limiting member contacts the conveying member to limit the battery cell, which is convenient for the injection member to inject liquid into the battery cell carried by the conveying member, and can improve the positioning accuracy of the battery cell during injection. The first detection member detects the distance between the conveying member in the first working state and the first wall, and can determine whether the conveying member or the limiting member is worn. The operator can replace the conveying member or the limiting member according to the detection result, adjust the position of the battery cell, and reduce the risk of misalignment between the injection member and the injection port of the battery cell, thereby further improving the positioning accuracy of the battery cell, reducing the risk of liquid splashing during injection, improving the reliability of the battery cell, and improving the reliability of the battery.

[0008] In some embodiments, the conveying member includes a second wall and a third wall arranged opposite to each other along a first direction, and the third wall is used to contact the stopper. The first detection member is arranged on the second wall, and the first detection member is configured to detect the distance between the second wall and the first wall in the first direction when in the first working state.

[0009] According to the technical solution of the embodiment of the present application, the third wall of the conveying member contacts the limiting member, the first detecting member is arranged on the second wall of the conveying member, and the first detecting member detects the distance between the second wall and the first wall, thereby improving the positioning accuracy of the battery cell and improving the reliability of the battery.

[0010] In some embodiments, along the first direction, a projection of the detection end of the first detection member does not overlap with a projection of the second wall.

[0011] According to the technical solution of the embodiment of the present application, in the first direction, the projection of the first detection member exceeds the projection of the second wall, that is, the first detection member exceeds the second wall, thereby reducing the risk of the second wall affecting the detection effect of the first detection member and improving the reliability of the battery.

[0012] In some embodiments, there are multiple first detection members, and the multiple first detection members are arranged along the second direction; and / or, the multiple first detection members are arranged along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0013] The technical solution of the embodiment of the present application provides multiple first detection components to further improve the detection effect and improve the reliability of the battery.

[0014] In some embodiments, the conveying member includes a bottom wall, a second wall, a third wall and two fourth walls, the second wall and the third wall are arranged opposite to each other along the first direction, the third wall is used to contact the limit member, the two fourth walls are arranged opposite to each other along the second direction, the second wall, the third wall and the two fourth walls are arranged around the outer periphery of the bottom wall, and jointly define a receiving groove for accommodating battery cells, the bottom wall is used to support the battery cells, and the first direction, the second direction and the thickness direction of the bottom wall are perpendicular to each other.

[0015] The technical solution of the embodiment of the present application defines a receiving groove by means of a bottom wall, a second wall, a third wall and two fourth walls. The receiving groove receives a battery cell, thereby reducing the risk of damage to the battery cell and improving the reliability of the battery.

[0016] In some embodiments, the liquid injection device further includes a second detection member, which is disposed on the fourth wall and is used to detect the posture of the battery cell in the receiving groove.

[0017] In the technical solution of the embodiment of the present application, the second detection member is used to detect the posture of the battery cell located in the receiving groove, thereby improving the positioning accuracy of the battery cell and improving the reliability of the battery.

[0018] In some embodiments, the third wall has a first surface facing the second wall, the second detection member includes a laser sensor, and a transmission path of a laser beam of the laser sensor is coplanar with the first surface.

[0019] The technical solution of the embodiment of the present application is to provide a laser sensor for detecting the posture of the battery cell in the receiving slot, thereby improving the positioning accuracy of the battery cell and improving the reliability of the battery.

[0020] In some embodiments, the conveying member includes a fifth wall. In the first direction, one end of the fifth wall is connected to the second wall, and the other end is connected to the third wall. The fifth wall divides the receiving groove into a plurality of sub-receiving grooves arranged along the second direction, and each sub-receiving groove is used to place a corresponding battery cell.

[0021] The technical solution of the embodiment of the present application is to divide the receiving groove into multiple sub-receiving grooves by the fifth wall, and multiple battery cells are placed in each sub-receiving groove respectively, which is convenient for the placement of multiple battery cells and reduces the contact between the multiple battery cells that affects the positioning, thereby improving the positioning accuracy of the battery cells and improving the reliability of the battery.

[0022] In some embodiments, the injection device also includes a controller and an alarm. The first detection element and the alarm signal are respectively connected to the controller. The controller is used to receive and process the detection information of the first detection element, and the controller is used to control the alarm to output alarm information.

[0023] The technical solution of the embodiment of the present application receives and processes the detection information of the first detection member through the controller, and outputs the alarm information through the alarm, thereby improving the positioning accuracy of the battery cell and improving the reliability of the battery.

[0024] In some embodiments, the main body has a plurality of side walls, which are sequentially arranged around the central axis of the main body, and the first wall is a side wall. There are a plurality of limiters, and each limiter is correspondingly arranged on a side wall. The injection device has a material receiving station and a liquid injection station, and the injection member is arranged at the liquid injection station. The injection device also includes a second driving member, which is used to drive the main body to rotate around the central axis of the main body to rotate the conveying member at the material receiving station to the liquid injection station.

[0025] The technical solution of the embodiment of the present application realizes the switching of the liquid injection station and the material receiving station by rotating the main body, thereby improving the liquid injection efficiency and improving the production efficiency.

[0026] In some embodiments, the liquid injection equipment has a material receiving station and a liquid injection station, the main body includes multiple first walls, and the liquid injection equipment also includes a conveying mechanism, which is used to convey the conveying member to the material receiving station. The conveying member cooperates with one of the multiple first walls at the material receiving station to make the conveying member contact with the limiting member.

[0027] The technical solution of the embodiment of the present application uses a conveying mechanism to convey the conveying parts, thereby improving automation, increasing production efficiency, and saving manpower.

[0028] In a second aspect, the present application also provides a battery production line, comprising a liquid injection device according to any embodiment of the first aspect.

[0029] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic diagram of the structure of a battery cell provided in some embodiments of the present application;

[0032] Figure 2 A schematic diagram of the structural decomposition of a battery cell provided in some embodiments of the present application;

[0033] Figure 3 A schematic diagram of the structure of a liquid injection device provided in some embodiments of the present application;

[0034] Figure 4 A schematic structural diagram of a liquid injection device provided in some embodiments of the present application from another perspective;

[0035] Figure 5 A schematic diagram of a limiting member and a conveying member provided in some embodiments of the present application;

[0036] Figure 6 A schematic diagram of a liquid injection component and a conveying component provided in some embodiments of the present application;

[0037] Figure 7 A schematic diagram of the structure of a conveying member provided in some embodiments of the present application;

[0038] Figure 8 Schematic diagram of a conveying member and a first clamp provided in some embodiments of the present application.

[0039] Icons: 1-liquid injection equipment; 10-main body; 11-first wall; 12-side wall; 20-limiting member; 21-abutting portion; 22-bearing portion; 30-conveying member; 31-second wall; 32-third wall; 321-first surface; 33-bottom wall; 34-fourth wall; 35-receiving groove; 36-fifth wall; 37-sub-receiving groove; 40-liquid injection member; 50-first detection member; 60-second detection member; 70-second driving member; 80-first clamp; 81-conveying mechanism; 90-controller; 91-alarm; 92-material receiving station; 93-liquid injection station; 100-battery cell; 110-casing; 111-shell; 112-end cover; 113-liquid injection port; 120-electrode assembly; 130-electrode terminal; X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. 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 and secondary relationship.

[0042] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0043] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" 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 a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0045] The term "multiple" as used in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

[0046] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0047] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.

[0048] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0049] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0050] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0051] The battery cells may be, but are not limited to, lithium ion batteries, sodium ion batteries, sodium lithium ion batteries, lithium metal batteries, sodium metal batteries, lithium sulfur batteries, magnesium ion batteries, nickel hydrogen batteries, nickel cadmium batteries, lead storage batteries, etc.

[0052] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a polygonal prismatic battery, such as a hexagonal prismatic battery, etc. There is no particular limitation in the embodiments of the present application.

[0053] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0054] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0055] In some embodiments, the housing includes an end cap and a shell, the shell is provided with an opening, and the end cap closes the opening to form a closed space for accommodating substances such as an electrode assembly and an electrolyte. The shell may be provided with one or more openings. One or more end caps may also be provided. The housing of the battery cell is provided with an injection port, which may be provided on the end cap, and the injection port is connected to the interior of the battery cell for injection of the electrolyte. After the injection of the electrolyte is completed, a sealing nail may be welded at the injection port to seal the injection port.

[0056] At present, from the perspective of market development, battery monomers have been widely used in electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, as well as electric tools, drones, energy storage equipment, etc. With the continuous expansion of the application fields of battery monomers, the market demand is also constantly expanding.

[0057] The development of battery cell technology must take into account multiple design factors at the same time, such as energy density, cycle life, discharge capacity, charge and discharge rate and other performance parameters. In addition, as environmental conditions and / or internal conditions of the battery cell change, battery reliability is also one of the key factors to consider.

[0058] The battery cell is usually injected with electrolyte through an injection device. The injection device includes an injection part, a limiter and a conveyor. After the battery cell is placed on the conveyor, the conveyor moves to contact the limiter to achieve the positioning of the battery cell. After positioning, the battery cell is injected with electrolyte through the injection part.

[0059] However, in the process of the liquid injection equipment injecting liquid into the battery cell, due to the contact or even abutment between the conveying member and the limiting member, the conveying member and the limiting member are prone to wear as the use time increases. After the conveying member and the limiting member are released, the preset position of the battery cell placed on the conveying member changes, that is, the relative position of the battery cell and the liquid injection member changes, resulting in the liquid injection port of the battery cell and the liquid injection member being misaligned when the liquid injection member injects liquid into the battery cell, which can easily cause electrolyte splashing. The composition of the electrolyte is generally composed of organic solvents, electrolyte salts, etc., which will chemically react with the outer shell of the battery cell, causing the outer shell to be corroded by the electrolyte, affecting the reliability of the battery cell, and thus affecting the reliability of the battery.

[0060] At the same time, electrolyte leakage may also cause the electrode terminals of the battery cell to be contaminated, as well as contaminate the injection equipment. In addition, the outer shell of the battery cell is usually provided with a QR code recording product information, and there is also a risk of electrolyte corroding the QR code.

[0061] Based on the above considerations, in order to solve the problem that when the liquid injection device is injecting liquid, the positioning accuracy of the battery cell is affected due to the wear of the conveying member and the limiting member, so that the battery cell is contaminated by the electrolyte and thus the reliability of the battery cell is poor, an embodiment of the present application provides a liquid injection device. The liquid injection device includes a main body, a limiting member, a conveying member, a liquid injection member and a first detection member. The limiting member is arranged on the main body. The first detection member is arranged on the conveying member, and is used to detect the distance between the conveying member and the main body when the conveying member contacts the limiting member.

[0062] The first detection member detects the distance between the conveying member in the first working state and the main body (first wall), thereby detecting whether the battery cell is located at a preset position, improving the positioning accuracy of the battery cell, reducing the risk of electrolyte splashing during injection, improving the reliability of the battery cell, and improving the reliability of the battery.

[0063] The liquid injection device disclosed in the embodiment of the present application can be used for, but is not limited to, the liquid injection of battery cells. The liquid injection device disclosed in the present application can also be used to inject liquid into other components that require liquid injection.

[0064] For the convenience of description, the following embodiments are described by taking a square-shell battery cell according to an embodiment of the present application as an example.

[0065] Please refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of a battery cell provided in some embodiments of the present application; Figure 2 This is a schematic diagram of the structure of a battery cell provided in some embodiments of the present application. Figure 1 and Figure 2As shown, the battery cell 100 includes a housing 110, an electrode assembly 120 and an electrode terminal 130. The housing 110 includes a shell 111 and an end cap 112. The shell 111 has an opening, and the end cap 112 closes the opening to isolate the internal environment of the battery cell 100 from the external environment.

[0066] The shell 111 is a component used to cooperate with the end cap 112 to form the internal environment of the battery cell 100, wherein the formed internal environment can be used to accommodate the electrode assembly 120, the electrolyte and other components. The shell 111 and the end cap 112 can be independent components. The shell 111 can be of various shapes and sizes. Specifically, the shape of the shell 111 can be determined according to the specific shape and size of the electrode assembly 120. The material of the shell 111 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0067] The end cap 112 refers to a component that covers the opening of the shell 111 to isolate the internal environment of the battery cell 100 from the external environment. Without limitation, the shape of the end cap 112 can be adapted to the shape of the shell 111 to match the shell 111. Optionally, the end cap 112 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 112 is not easily deformed when squeezed and collided, so that the battery cell 100 can have a higher structural strength and reliability can also be improved. Functional components such as electrode terminals 130 can be provided on the end cap 112. The electrode terminal 130 can be used to electrically connect to the electrode assembly 120 for outputting or inputting electrical energy of the battery cell 100. The material of the end cap 112 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this. In some embodiments, an insulating structure may be provided inside the end cap 112, and the insulating structure may be used to isolate the electrical connection components in the housing 111 from the end cap 112 to reduce the risk of short circuit. For example, the insulating structure may be plastic, rubber, or the like.

[0068] The housing 110 of the battery cell 100 is provided with an injection port 113. In some embodiments, the injection port 113 may be provided on the end cap 112, and the injection port 113 is connected to the interior of the battery cell 100 for injecting electrolyte. After the injection of electrolyte is completed, a sealing nail may be welded to the injection port 113 to seal the injection port 113.

[0069] The electrode assembly 120 is a component in the battery cell 100 where an electrochemical reaction occurs. One or more electrode assemblies 120 may be included in the housing 111. The electrode assembly 120 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet, and the separator is used to separate the positive electrode sheet and the negative electrode sheet to reduce the risk of short circuit between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode assembly 120, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute a pole ear. The positive pole ear and the negative pole ear may be located together at one end of the main body or respectively at both ends of the main body.

[0070] Please refer to Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the structure of the liquid injection device provided in some embodiments of the present application. Figure 4 This is a schematic diagram of the structure of the liquid injection device provided in some embodiments of the present application from another perspective. Figure 3 The liquid injection part is hidden in it. The embodiment of the present application provides a liquid injection device 1 for injecting electrolyte into a battery cell 100. The liquid injection device 1 includes a main body 10, a limiter 20, a conveying member 30, a liquid injection member 40 and a first detection member 50. The main body 10 includes a first wall 11. The limiter 20 is arranged on the first wall 11. The conveying member 30 is used to carry the battery cell 100, and the conveying member 30 has a first working state in contact with the limiter 20. The liquid injection member 40 is configured to inject liquid into the battery cell 100 carried by the conveying member 30 in the first working state. The first detection member 50 is arranged on the conveying member 30, and the first detection member 50 is configured to detect the distance between the conveying member 30 and the first wall 11 in the first direction X when the conveying member 30 is in the first working state. The first direction X is parallel to the thickness direction of the first wall 11.

[0071] In some embodiments, the first direction may be represented by the direction indicated by the letter X in the figure.

[0072] In some embodiments, the main body 10 may further include a carrier, and when the conveying member 30 is in the first working state, the conveying member 30 is disposed on the carrier.

[0073] In some embodiments, in the first working state, the conveying member 30 may abut against the limiting member 20 .

[0074] In some embodiments, the conveying member 30 may also have a second working state separated from the limiting member 20; when the conveying member 30 is in the second working state, the conveying member 30 may be conveyed from the previous station to the injection station 93; or, after the battery cell 100 conveyed by the conveying member 30 completes the injection, it is conveyed from the injection station 93 to the next station.

[0075] In some embodiments, the main body 10 may be a component connected to the outside world. The main body 10 has a first wall 11 , and the first wall 11 may be an outer wall of the main body 10 .

[0076] In some embodiments, the limiting member 20 may be a plate-shaped member or a block-shaped member.

[0077] In some embodiments, the material of the limiting member 20 can be plastic, metal, etc.

[0078] In some embodiments, the limiting member 20 may be connected to the first wall 11 by gluing, bolting, or the like.

[0079] In some embodiments, the limit member 20 can be plate-shaped, and the limit member 20 can have two surfaces arranged opposite to each other along the first direction X, one of which is in close contact with the first wall 11, and the other surface is used to contact the conveying member 30, and the first direction X can be parallel to the thickness direction of the limit member 20.

[0080] In some embodiments, the conveying member 30 may be a clamping jaw, through which the battery cell 100 is moved. When the conveying member 30 is in the first working state, one of the outer surfaces of the clamping jaw contacts the limiting member 20 .

[0081] In some embodiments, the conveying member 30 may be a box body, and the box body may have a receiving space for carrying the battery cell 100. When the conveying member 30 is in the first working state, one of the outer surfaces of the box body contacts the limiting member 20.

[0082] In some embodiments, the material of the conveying member 30 may be metal or composite metal. The surface of the conveying member 30 that contacts the battery cell 100 may be provided with a plastic or rubber coating to reduce the risk of damage to the battery cell 100.

[0083] In some embodiments, when the conveying member 30 is in the first working state, the conveying member 30 contacts the limiting member 20, the conveying member 30 is conveyed to a preset position, the battery cell 100 is located at the position to be injected, and the injection member 40 injects liquid into the battery cell 100 at the position to be injected.

[0084] In some embodiments, the liquid injection member 40 may include a liquid injection tube and a liquid injection head, wherein the liquid injection tube is used to store the liquid medium, and the liquid injection head is used to output the liquid medium in the liquid injection tube. The liquid injection tube may be a cylindrical container having a receiving cavity for receiving the liquid medium. The liquid injection tube may also be square, round, etc.

[0085] In some embodiments, a set volume of liquid medium can be injected into the receiving cavity of the injection tube before injection, and there is no need to add liquid medium during injection. In other embodiments, the end of the injection tube away from the injection head can be externally connected to a pipeline, and when the injection head outputs the liquid medium during injection, the external pipeline injects the liquid medium into the receiving cavity of the injection tube.

[0086] In some embodiments, the liquid medium may be an electrolyte. The liquid injection device 1 may be used to inject liquid into the battery cell 100 .

[0087] In some embodiments, the injection head can be cylindrical or conical, etc. One end of the injection head is connected to the injection tube, and the space inside the injection head is connected to the receiving cavity of the injection tube. The injection head is provided with a liquid outlet, and the liquid medium in the receiving cavity can be discharged through the liquid outlet.

[0088] In some embodiments, the material of the liquid injection part 40 can be plastic, rubber, glass, etc.

[0089] In some embodiments, the first detection member 50 may be a micrometer screw, a laser sensor, an infrared sensor, or the like.

[0090] In some embodiments, the first detection element 50 may be a laser sensor.

[0091] In some embodiments, the laser sensor may emit laser light along the first direction X, so as to test the distance between the conveying member 30 and the first wall 11 in the first direction X.

[0092] In some embodiments, the laser sensor may have its own display, which displays the detected distance to facilitate operators to read data.

[0093] In some embodiments, the laser sensor can also be connected to an external display to display the detected distance on the external display, making it easier for operators to read data.

[0094] In some embodiments, a mounting groove may be provided on the conveying member 30 , and the first detecting member 50 may be disposed in the mounting groove.

[0095] In some embodiments, the first detection member 50 may be disposed on the conveying member 30 by gluing, bolting, or the like.

[0096] In some embodiments, under the premise that the conveying member 30 and the limiting member 20 are not worn, the conveying member 30 is located at a preset position, the conveying member 30 is in contact with the limiting member 20, and the distance between the conveying member 30 and the first wall 11 can be a theoretically set value. During use, the first detection member 50 detects the distance between the conveying member 30 and the first wall 11 as an actual value. By comparing whether there is a deviation between the two values, it can be determined whether the conveying member 30 and the limiting member 20 are worn, and whether the conveying member 30 is located at the preset position, and whether the battery cell 100 is located at the position to be injected.

[0097] For example, if the actual value detected by the first detection member 50 is less than the set value, at least one of the surfaces where the conveying member 30 contacts the stopper 20 and the surfaces where the stopper 20 contacts the conveying member 30 is worn. After replacing the conveying member 30, if the actual value detected by the first detection member 50 is still less than the set value, the stopper 20 is worn, and the stopper 20 of the injection device 1 is replaced to reduce the risk of poor positioning accuracy of the battery cell 100. If the actual value detected is the same as the set value, the conveying member 30 is worn, and the conveying member 30 of the injection device 1 is replaced to reduce the risk of poor positioning accuracy of the battery cell 100.

[0098] In some embodiments, the actual value detected by the first detection member 50 and the set value can be compared manually by an operator or by an external computing device such as a host computer.

[0099] According to the technical solution of the embodiment of the present application, the limiting member 20 contacts the conveying member 30 to limit the battery cell 100, so as to facilitate the injection member 40 to inject liquid into the battery cell 100 carried by the conveying member 30, and improve the positioning accuracy of the battery cell 100 during injection. By setting the first detection member 50 to detect the distance between the conveying member 30 in the first working state and the first wall 11, it can be determined whether the conveying member 30 or the limiting member 20 is worn. The operator can replace the conveying member 30 or the limiting member 20 according to the detection result, adjust the position of the battery cell 100, and reduce the risk of misalignment between the injection member 40 and the injection port 113 of the battery cell 100, thereby further improving the positioning accuracy of the battery cell 100, reducing the risk of liquid splashing during injection, improving the reliability of the battery cell 100, and improving the reliability of the battery.

[0100] Please refer to Figure 3 and Figure 4 , and refer to Figure 5 , Figure 5Schematic diagram of a limiter and a conveyor provided for some embodiments of the present application. In order to facilitate the display of the structure of the conveyor and the limiter, the conveyor and the limiter are in a non-contact state. In some embodiments, the conveyor 30 includes a second wall 31 and a third wall 32 arranged opposite to each other along a first direction X, and the third wall 32 is used to contact the limiter 20. The first detection member 50 is arranged on the second wall 31, and the first detection member 50 is configured to detect the distance between the second wall 31 and the first wall 11 in the first direction X when in the first working state.

[0101] In some embodiments, the conveying member 30 may be a box body, and the second wall 31 and the third wall 32 are two opposite walls of the box body, wherein the outer surface of the third wall 32 contacts the stopper 20 .

[0102] In some embodiments, the conveying member 30 may be a clamping claw, and the second wall 31 and the third wall 32 jointly clamp the battery cell 100 . The outer surface of the third wall 32 contacts the limiting member 20 .

[0103] In some embodiments, the first detection member 50 can be disposed on the second wall 31 . When the conveying member 30 is in the first working state, that is, when the third wall 32 abuts against the limiting member 20 , the first detection member 50 can detect the distance between the second wall 31 and the first wall 11 .

[0104] In some embodiments, the first detection member 50 can be disposed on the third wall 32 , and when the conveying member 30 is in the first working state, that is, when the third wall 32 contacts the limiting member 20 , the first detection member 50 can detect the distance between the third wall 32 and the first wall 11 .

[0105] According to the technical solution of the embodiment of the present application, the third wall 32 of the conveying member 30 contacts the limiting member 20, and the first detecting member 50 is arranged on the second wall 31 of the conveying member 30. The first detecting member 50 detects the distance between the second wall 31 and the first wall 11, thereby improving the positioning accuracy of the battery cell 100 and improving the reliability of the battery.

[0106] Please refer to Figure 5 In some embodiments, along the first direction X, the projection of the detection end of the first detection member 50 does not overlap with the projection of the second wall 31 .

[0107] In some embodiments, with the first direction X as the projection direction, a portion of the projection of the first detection member 50 may overlap with the projection of the second wall 31, and this portion of the projection may be the installation portion of the first detection member 50, and another portion of the projection may exceed the projection of the second wall 31, and this portion of the projection may be the detection end of the first detection member 50.

[0108] In some embodiments, the first detection member 50 may be a laser sensor, and the detection end may be a portion that emits laser.

[0109] In some embodiments, the first detection member 50 may be a camera, and the detection end may be a camera part.

[0110] In some embodiments, the second wall 31 and the third wall 32 may be parallel to each other, and along the first direction X, a projection of the second wall 31 overlaps with a projection of the third wall 32 .

[0111] In some embodiments, along the first direction X, the projection of the detection end of the first detection member 50 does not overlap with the projection of the third wall 32 .

[0112] In some embodiments, taking the first direction X as the length direction of the battery cell 100 as an example, and taking the first direction X as the projection direction, the projection of the first detection member 50 can exceed the projection of the second wall 31 in the width direction of the battery cell 100, and the projection of the first detection member 50 can exceed the projection of the second wall 31 in the height direction of the battery cell 100, so that in the first direction X, the first detection member 50 can directly correspond to the first wall 11, reducing the second wall 31 between the first detection member 50 and the first wall 11, affecting the detection effect.

[0113] According to the technical solution of the embodiment of the present application, in the first direction X, the projection of the first detection member 50 exceeds the projection of the second wall 31, that is, the first detection member 50 exceeds the second wall 31, thereby reducing the risk of the second wall 31 affecting the detection effect of the first detection member 50 and improving the reliability of the battery.

[0114] Please refer to Figure 5 In some embodiments, there are multiple first detection members 50, and the multiple first detection members 50 are arranged along the second direction Y; and / or, the multiple first detection members 50 are arranged along the third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0115] In some embodiments, the second direction may be represented by the direction indicated by the letter Y in the figure. The third direction may be represented by the direction indicated by the letter Z in the figure.

[0116] In some embodiments, the first direction X may be perpendicular to the second direction Y.

[0117] In some embodiments, the first direction X may be perpendicular to the third direction Z.

[0118] In some embodiments, the second direction Y may be perpendicular to the third direction Z.

[0119] In some embodiments, the first direction X may be a length direction of the battery cell 100 , the second direction Y may be a width direction of the battery cell 100 , and the third direction Z may be a height direction of the battery cell 100 .

[0120] In some embodiments, the number of the first detection members 50 may be two or more.

[0121] In some embodiments, a plurality of first detection members 50 may be disposed on the second wall 31. The plurality of first detection members 50 may be arranged along the second direction Y, with the first direction X being the projection direction, and the projection of each first detection member 50 may exceed the projection of the second wall 31 in the third direction Z.

[0122] In some embodiments, a plurality of first detection members 50 may be disposed on the second wall 31. The plurality of first detection members 50 may be arranged along the third direction Z, with the first direction X being the projection direction, and the projection of each first detection member 50 may exceed the projection of the second wall 31 in the second direction Y.

[0123] The technical solution of the embodiment of the present application is to set up multiple first detection members 50 to further improve the detection effect and improve the reliability of the battery.

[0124] Please refer to Figure 5 , and refer to Figure 7 , Figure 7 A schematic diagram of the structure of a conveying member provided for some embodiments of the present application. In some embodiments, the conveying member 30 includes a bottom wall 33, a second wall 31, a third wall 32, and two fourth walls 34, the second wall 31 and the third wall 32 are arranged relatively along the first direction X, the third wall 32 is used to contact the stopper 20, the two fourth walls 34 are arranged relatively along the second direction Y, the second wall 31, the third wall 32, and the two fourth walls 34 are arranged around the outer periphery of the bottom wall 33, and together define a receiving groove 35 for accommodating a battery cell 100, the bottom wall 33 is used to carry the battery cell 100, and the first direction X, the second direction Y, and the thickness direction of the bottom wall 33 are perpendicular to each other.

[0125] In some embodiments, one end of the second wall 31 in the third direction Z, one end of the third wall 32 in the third direction Z, and one end of the two fourth walls 34 in the third direction Z are arranged around the outer periphery of the bottom wall 33, and the other end of the second wall 31 in the third direction Z, the other end of the third wall 32 in the third direction Z, and the other end of the two fourth walls 34 in the third direction Z form an opening, so that when the battery cell 100 is placed, the battery cell 100 can be placed in the receiving groove 35 through the opening. The bottom wall 33, the second wall 31, the third wall 32, and the two fourth walls 34 together define the receiving groove 35 for receiving the battery cell 100.

[0126] In some embodiments, the receiving groove 35 can accommodate a plurality of battery cells 100 , and the plurality of battery cells 100 are arranged along the second direction Y. The plurality of battery cells 100 can be in direct contact with each other or separated by a partition plate.

[0127] In some embodiments, one end of the second wall 31 in the second direction Y is connected to one end of a fourth wall 34 in the first direction X, and the other end of the second wall 31 in the second direction Y is connected to one end of another fourth wall 34 in the first direction X. One end of the third wall 32 in the second direction Y is connected to the other end of a fourth wall 34 in the first direction X, and the other end of the third wall 32 in the second direction Y is connected to the other end of another fourth wall 34 in the first direction X.

[0128] The technical solution of the embodiment of the present application defines a receiving groove 35 by means of a bottom wall 33, a second wall 31, a third wall 32 and two fourth walls 34. The receiving groove 35 receives the battery cell 100, thereby reducing the risk of damage to the battery cell 100 and improving the reliability of the battery.

[0129] Please refer to FIG. 7 . In some embodiments, the liquid injection device 1 further includes a second detection member 60 . The second detection member 60 is disposed on the fourth wall 34 . The second detection member 60 is used to detect the posture of the battery cell 100 located in the receiving groove 35 .

[0130] In some embodiments, the posture of the battery cell 100 may be the relative position between the battery cell 100 and the third wall 32 , the angle between the wall surface of the battery cell 100 facing the third wall 32 and the third wall 32 , etc. when the battery cell 100 is disposed in the receiving groove.

[0131] In some embodiments, the second detection member 60 can be a camera, which directly photographs the battery cell 100 disposed in the receiving groove 35, thereby obtaining a position image of the battery cell 100, detecting the relative position between the battery cell 100 and the third wall 32, the angle between the wall surface of the battery cell 100 facing the third wall 32 and the third wall 32, etc.

[0132] In some embodiments, the second detection member 60 can be an image sensor, which collects image information of the battery cell 100 located in the receiving groove 35, thereby obtaining a position image of the battery cell 100, detecting the relative position between the battery cell 100 and the third wall 32, the angle between the wall surface of the battery cell 100 facing the third wall 32 and the third wall 32, etc.

[0133] In some embodiments, the second detection member 60 may be a laser sensor. The second detection member 60 may emit a laser beam along the second direction Y, and the transmission path of the laser beam is located in the same plane as the inner surface of the third wall. The battery cell 100 is disposed in the receiving groove 35, and the end of the battery cell 100 close to the third wall 32 in the first direction X is located in the same plane as the laser beam emitted by the laser sensor. The battery cell 100 is disposed in the receiving groove 35, and when the battery cell 100 is not disposed in the preset position in the receiving groove 35, the light of the second detection member 60 will be irradiated on the battery cell 100, and at this time it can be detected that the battery cell 100 is not disposed in the preset position.

[0134] In the technical solution of the embodiment of the present application, the second detection member 60 is used to detect the posture of the battery cell 100 located in the receiving groove 35, thereby improving the positioning accuracy of the battery cell 100 and improving the reliability of the battery.

[0135] Please refer to Fig. 7 . In some embodiments, the third wall 32 has a first surface 321 facing the second wall 31 . The second detection member 60 may be a laser sensor. The transmission path of the laser beam of the laser sensor is coplanar with the first surface 321 .

[0136] In some embodiments, the third wall 32 may have a first surface 321, which is a surface of the third wall 32 facing the second wall 31. The first surface 321 may be an inner surface of the third wall 32, that is, a surface of the third wall 32 for forming the receiving groove 35.

[0137] In some embodiments, the laser beam emitted by the laser sensor may be coplanar with the first surface 321. When the first surface 321 is worn, the fit between the battery cell 100 and the first surface 321 changes, so that the posture of the battery cell 100 changes. For example, the angle between the end surface of the battery cell 100 facing the first surface 321 and the first surface 321 changes, or the position of the battery cell 100 moves toward the first wall 11, so that the battery cell 100 blocks the laser beam, and the presence of the laser beam is detected on the surface of the battery cell 100, so that it is determined that the battery cell 100 is not located at the preset position when it is set in the receiving groove 35.

[0138] In some embodiments, a laser sensor is disposed on one of the fourth walls 34, and a receiver may also be disposed on the other fourth wall 34. The receiver is arranged to match the position of the laser sensor, and the laser beam emitted by the laser sensor is received by the receiver. When the first surface 321 is worn, the cooperation between the battery cell 100 and the first surface 321 changes, so that the posture of the battery cell 100 changes, thereby causing the battery cell 100 to block the laser beam, and the receiver does not receive the laser beam emitted by the laser sensor. The receiver may send an alarm signal to prompt the operator that the battery cell 100 is not located at the preset position.

[0139] Please refer to Figure 5 and Figure 7 In some embodiments, the conveying member 30 includes a fifth wall 36. In the first direction X, one end of the fifth wall 36 is connected to the second wall 31, and the other end is connected to the third wall 32. The fifth wall 36 divides the receiving groove 35 into a plurality of sub-receiving grooves 37 arranged along the second direction Y, and each sub-receiving groove 37 is used to place a corresponding battery cell 100.

[0140] In some embodiments, the number of the fifth wall 36 can be one, one end of the fifth wall 36 in the first direction X can be connected to the second wall 31, and the other end of the fifth wall 36 in the first direction X can be connected to the third wall 32, and the fifth wall 36 divides the accommodating groove 35 into two sub-accommodating grooves 37.

[0141] In some embodiments, there may be a plurality of fifth walls 36 , and the plurality of fifth walls 36 may be spaced apart along the second direction Y. For example, there may be two fifth walls 36 , and the two fifth walls 36 divide the receiving groove 35 into three sub-receiving grooves 37 .

[0142] In some embodiments, the receiving groove 35 can hold multiple battery cells 100, so as to facilitate the simultaneous injection of multiple battery cells 100 and improve production efficiency.

[0143] In some embodiments, the number of the injection piece 40 may be one, and one injection piece 40 moves along the arrangement direction of the battery cells 100 to inject liquid into the multiple battery cells 100 in sequence.

[0144] Please refer to Figure 6 , Figure 6 Schematic diagram of the injection piece and the conveying piece provided in some embodiments of the present application. In some embodiments, there may be multiple injection pieces 40, each of which corresponds to each battery cell 100, and simultaneously injects liquid into multiple battery cells 100 in the conveying piece.

[0145] The technical solution of the embodiment of the present application is to divide the receiving groove 35 into multiple sub-receiving grooves 37 by the fifth wall 36, and multiple battery cells 100 are respectively placed in each sub-receiving groove 37, so as to facilitate the placement of multiple battery cells 100, and at the same time reduce the contact between the multiple battery cells 100 to affect the positioning, thereby improving the positioning accuracy of the battery cells 100 and improving the reliability of the battery.

[0146] Please refer to Figure 3 In some embodiments, the injection device 1 also includes a controller 90 and an alarm 91. The first detection component 50 and the alarm 91 are respectively connected to the controller 90 by signal. The controller 90 is used to receive and process the detection information of the first detection component 50, and the controller is used to control the alarm 91 to output alarm information.

[0147] In some embodiments, the connection method between the controller 90 and the first detection component 50 can be a cable connection, a Bluetooth connection, a WiFi connection, etc.

[0148] In some embodiments, the connection method between the controller 90 and the alarm 91 can be cable connection, Bluetooth connection, WiFi connection, etc.

[0149] In some embodiments, the controller 90 may be a host computer.

[0150] In some embodiments, the controller 90 is used to identify the detection information of the first detection member 50, that is, the first detection member 50 detects the distance between the conveying member 30 in the first working state and the first wall 11, and the detected value can be transmitted to the controller 90, and the controller 90 compares the detected value with the set value to see if they are consistent. If they are inconsistent, the controller 90 controls the alarm 91 to sound an alarm.

[0151] In some embodiments, the alarm 91 may be a buzzer. When the controller 90 compares the detected value and the set value and finds that they are inconsistent, the controller 90 controls the alarm 91 to emit a sound alarm.

[0152] In some embodiments, the alarm 91 can be a display. When the detected value compared by the controller 90 is inconsistent with the set value, the controller 90 controls the alarm 91 to display an alarm image on the screen. The alarm image can be directly displayed as text or the image can change color.

[0153] In some embodiments, the alarm 91 can be an alarm light. When the controller 90 compares and detects a value that is inconsistent with the set value, the controller 90 controls the alarm 91 to emit lights of different colors to alarm, such as red, yellow, green, etc.

[0154] The technical solution of the embodiment of the present application receives and processes the detection information of the first detection member 50 through the controller 90, and outputs the alarm information through the alarm 91, thereby improving the positioning accuracy of the battery cell 100 and improving the reliability of the battery.

[0155] Please refer to Figure 3 and Figure 4In some embodiments, the main body 10 has a plurality of side walls 12, which are sequentially arranged around the central axis of the main body 10, and the side wall 12 is a first wall 11. There are a plurality of stoppers 20, and each stopper 20 is correspondingly arranged on a side wall 12. The liquid injection device 1 has a material receiving station 92 and a liquid injection station 93, and the liquid injection member 40 is arranged at the liquid injection station 93. The liquid injection device 1 also includes a second driving member 70, which is used to drive the main body 10 to rotate around the central axis of the main body 10, so as to rotate the conveying member 30 at the material receiving station 92 to the liquid injection station 93.

[0156] In some embodiments, the main body 10 may further include an upper wall and a lower wall, wherein one end of the plurality of side walls 12 in the third direction Z is arranged around the outer periphery of the lower wall, and the other end of the plurality of side walls 12 in the third direction Z is arranged around the outer periphery of the upper wall.

[0157] In some embodiments, the main body 10 may be a regular polyhedron, and the first wall 11 may be a side wall 12 .

[0158] In some embodiments, the main body 10 may be a regular hexahedron, and the number of the first walls 11 may be six.

[0159] In some embodiments, the main body 10 may be a regular octahedron, and the number of the first walls 11 may be eight.

[0160] In some embodiments, the second driving member 70 may include a rotating shaft and a motor, one end of the rotating shaft is connected to the motor, and the other end is connected to the main body. The rotating shaft may be arranged along the third direction Z, and the axis of the rotating shaft may coincide with the axis of the main body 10 in the third direction Z. The motor drives the rotating shaft to rotate, thereby driving the main body 10 to rotate around the central axis of the main body 10.

[0161] In some embodiments, the injection member 40 is disposed at the injection station 93. When the conveying member 30 on which the battery cell 100 is placed is driven by the main body to the injection station 93, the injection member 40 injects liquid into the battery cell 100 placed on the conveying member 30. The position of the injection member 40 can remain unchanged relative to the main body 10. The injection member 40 can be connected to an external bracket.

[0162] In some embodiments, there are multiple limiting members 20 , and one limiting member 20 is correspondingly disposed on each first wall 11 .

[0163] In some embodiments, the battery cell 100 is placed on the conveying member 30, and the moving path of the conveying member 30 is fixed. One of the conveying members 30 is transported to the material receiving station 92 and contacts one of the stoppers 20, and the main body 10 rotates, driving the stopper 20 and the conveying member 30 to rotate to the liquid injection station 93, and the liquid injection member 40 injects liquid into the battery cell 100 placed in the conveying member 30, and then the main body 10 rotates, driving the stopper 20 and the conveying member 30 to rotate to the material unloading station. While the main body 10 rotates to drive one stopper 20 and the corresponding conveying member 30 to rotate from the material receiving station 92 to the liquid injection station 93, another stopper 20 moves to the material receiving station 92, and another conveying member 30 is transported to the material receiving station 92 and contacts another stopper 20, and the process cycle is performed.

[0164] The technical solution of the embodiment of the present application realizes the switching between the injection station 93 and the material receiving station 92 by rotating the main body 10, thereby improving the injection efficiency and the production efficiency. Figures 3 to 5 In some embodiments, the limiting member 20 includes an abutting portion 21 and a bearing portion 22 connected to each other, the abutting portion 21 is disposed on the first wall 11 , the abutting portion 21 is used to contact the conveying member 30 , and the bearing portion 22 is used to bear the conveying member 30 .

[0165] In some embodiments, the limiting member 20 includes an abutting portion 21 and a bearing portion 22 connected to each other, the abutting portion 21 extends along the third direction Z, and one end of the abutting portion 21 in the third direction Z is connected to the bearing portion 22 .

[0166] In some embodiments, the third direction Z may be parallel to the gravity direction. The carrying portion 22 may carry the conveying member 30 , and the carrying portion 22 has two opposite surfaces in the third direction Z, wherein the upper surface is used to contact with the conveying member 30 .

[0167] In some embodiments, the bearing portion 22 extends along the first direction X, and one end of the bearing portion 22 in the first direction X is connected to one end of the abutting portion 21 in the third direction Z.

[0168] In some embodiments, the limiting member 20 may be integrally formed.

[0169] In some embodiments, the bearing portion 22 and the abutting portion 21 may be connected by welding.

[0170] In some embodiments, the bearing portion 22 and the abutting portion 21 may both be plate-shaped members.

[0171] In some embodiments, the surfaces of the abutting portion 21 and the bearing portion 22 of the limiting member 20 that are in contact with the conveying member 30 may be coated with an insulating coating, and the material may be rubber, plastic, or the like.

[0172] In some embodiments, with the first direction X as the projection direction, a portion of the projection of the first wall 11 can completely cover the projection of the abutment portion 21, and another portion of the projection of the first wall 11 can exceed the projection of the abutment portion 21 in the third direction Z, so that the first detection member 50 can detect the distance between the first wall 11 and the conveying member 30 in the first direction X. The technical solution of the embodiment of the present application improves the positioning accuracy and placement stability of the conveying member 30 by having the abutment portion 21 contact the conveying member 30 and the carrying portion 22 carry the conveying member 30, thereby improving the positioning accuracy and placement stability of the conveying member 30, improving the positioning accuracy and placement stability of the battery cell 100, and improving the reliability of the battery.

[0173] In some embodiments, the main body 10 may have a carrying platform, and the carrying portion 22 of the limiting member 20 is disposed on the carrying platform for carrying the conveying member 30 .

[0174] In some embodiments, a locking portion may be provided on the carrier, and the locking portion may be a slot, a clamping claw, a limiting column, etc. When the conveying member 30 is provided on the carrier, the locking portion fixes the position of the conveying member 30 to reduce the risk of the position of the conveying member 30 shifting during the rotation of the main body 10, thereby improving the injection accuracy of the battery cell 100 and improving the reliability of the battery.

[0175] In some embodiments, a sensor may be provided on the abutment portion 21 of the limiting member 20. When the conveying member 30 contacts the abutment portion 21, the sensor senses the position of the conveying member 30, and the main body 10 receives a rotation instruction and rotates to transport the conveying member 30 from the material receiving station 92 to the liquid injection station 93.

[0176] In some embodiments, the injection member 40 may be provided with a sensor, and when the conveying member 30 is transported to the injection station 93, the injection member 40 injects liquid into the battery cell 100. When the sensor senses that the injection member 40 has completed the injection, the main body 10 receives a rotation instruction and rotates, transporting the conveying member 30 from the injection station 93 to the unloading station.

[0177] In some embodiments, one conveying member 30 may be transported to the material receiving station 92 and another conveying member 30 may be transported to the injection station 93 at the same time. At this time, it is necessary to ensure that one conveying member 30 is in contact with the limiting member 20 and the battery cell 100 in the other conveying member 30 is injected with liquid before the main body 10 is rotated.

[0178] In some embodiments, the liquid injection equipment 1 has a material receiving station 92 and a liquid injection station 93, the main body 10 includes multiple first walls 11, and the liquid injection equipment 1 also includes a conveying mechanism 81, which is used to convey the conveying member 30 to the material receiving station 92. The conveying member 30 cooperates with one of the multiple first walls 11 at the material receiving station 92 to make the conveying member 30 contact with the limiting member 20.

[0179] In some embodiments, the conveying mechanism 81 may be a guide rail and a motor, wherein the motor is used to drive the guide rail to move, and the conveying member 30 is disposed on the guide rail, thereby conveying the conveying member 30 to the material receiving station 92 .

[0180] In some embodiments, the conveying mechanism 81 may be a conveyor belt, and the conveying member 30 is disposed on the conveyor belt, so as to convey the conveying member 30 to the material receiving station 92 .

[0181] In some embodiments, in the third direction Z, the conveying mechanism 81 and the stopper 20 may be spaced apart to reduce the risk of interference between the conveying mechanism 81 and the stopper 20. The liquid injection device 1 may include a lifting platform, the conveying mechanism 81 is connected to the lifting platform, the conveying mechanism 81 conveys the conveying member 30 to the lifting platform, and the lifting platform conveys the conveying member 30 to contact the stopper 20.

[0182] The technical solution of the embodiment of the present application uses the conveying mechanism 81 to convey the conveying member 30, thereby improving automation, increasing production efficiency, and saving manpower.

[0183] Please refer to Figure 8 , Figure 8 Schematic diagram of a conveying member and a first clamping jaw provided in some embodiments of the present application. In some embodiments, the liquid injection device 1 further includes a first clamping jaw 80 , and the first clamping jaw 80 is configured to place the battery cell 100 on the conveying member 30 .

[0184] In some embodiments, the liquid injection device 1 may include a driving motor connected to the first clamping jaw 80 to drive the first clamping jaw 80 to place the battery cell 100 in the receiving groove 35 of the conveying member 30 .

[0185] The technical solution of the embodiment of the present application places the battery cell 100 on the conveying member 30 through the first clamping jaw 80, thereby improving automation, saving manpower, and improving production efficiency.

[0186] Please refer to Figure 3 and Figure 4 In some embodiments, the injection device 1 further includes a second clamp, which is configured to move the conveying member 30 from the conveying mechanism 81 to the first working state.

[0187] The second clamping jaw may also be replaced by a robot arm or other components for moving the conveying member 30 .

[0188] An embodiment of the present application also provides a battery production line, comprising the liquid injection device 1 of any of the above embodiments.

[0189] Please refer to Figure 3 and Figure 4In some embodiments, the liquid injection device 1 includes a main body 10, a stopper 20, a conveying member 30, a liquid injection member 40, and a first detection member 50. The battery cell 100 to be injected is placed on the conveying member 30. The stopper 20 is provided on the main body 10, and the conveying member 30 moves to contact with the stopper 20 to realize the positioning of the conveying member 30, thereby realizing the positioning of the battery cell 100.

[0190] The first detection member 50 is disposed on the conveying member 30 . After the battery cell 100 is positioned, the first detection member 50 detects the distance between the conveying member 30 and the main body 10 to detect whether the conveying member 30 is at a preset position.

[0191] After determining that the battery cell 100 is at a preset position, the liquid injection member 40 injects liquid into the battery cell 100 .

[0192] The technical solution of the embodiment of the present application improves the positioning accuracy of the battery cell 100 during liquid injection by contacting the limiting member 20 with the conveying member 30. At the same time, the first detection member 50 detects the position of the conveying member 30, further improving the positioning accuracy of the battery cell 100, reducing the risk of liquid splashing during liquid injection, improving the reliability of the battery cell 100, and improving the reliability of the battery.

[0193] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned 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 includes all technical solutions falling within the scope of the claims.

Claims

1. A liquid injection device for injecting electrolyte into a battery cell, characterized in that: include: A main body portion including a first wall; A limiting member, arranged on the first wall; A conveying member, used for carrying the battery monomer, wherein the conveying member has a first working state in contact with the limiting member; a liquid injection member, the liquid injection member being configured to inject liquid into the battery monomer carried by the conveying member in the first working state; The first detection member is disposed on the conveying member, and is configured to detect the distance between the conveying member and the first wall in a first direction when the conveying member is in the first working state, wherein the first direction is parallel to a thickness direction of the first wall.

2. The liquid injection device according to claim 1, characterized in that: The conveying member comprises a second wall and a third wall which are arranged opposite to each other along the first direction, and the third wall is used to contact with the limiting member; The first detection member is disposed on the second wall, and the first detection member is configured to detect a distance between the second wall and the first wall in the first direction when the second wall is in the first working state.

3. The liquid injection device according to claim 2, characterized in that: Along the first direction, a projection of the detection end of the first detection member does not overlap with a projection of the second wall.

4. The liquid injection device according to claim 2, characterized in that: There are multiple first detection members, and the multiple first detection members are arranged along the second direction; and / or the multiple first detection members are arranged along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

5. The liquid injection device according to claim 1, characterized in that: The conveying member includes a bottom wall, a second wall, a third wall and two fourth walls, the second wall and the third wall are arranged opposite to each other along the first direction, the third wall is used to contact the limit member, the two fourth walls are arranged opposite to each other along the second direction, the second wall, the third wall and the two fourth walls are arranged around the outer periphery of the bottom wall, and jointly define a receiving groove for receiving the battery monomer, the bottom wall is used to carry the battery monomer, and the first direction, the second direction and the thickness direction of the bottom wall are perpendicular to each other.

6. The liquid injection device according to claim 5, characterized in that: The liquid injection device further includes a second detection member, which is disposed on the fourth wall and is used to detect the posture of the battery cell in the receiving groove.

7. The liquid injection device according to claim 6, characterized in that: The third wall has a first surface facing the second wall, the second detection member includes a laser sensor, and a transmission path of a laser beam of the laser sensor is coplanar with the first surface.

8. The liquid injection device according to claim 5, characterized in that: The conveying member includes a fifth wall. In the first direction, one end of the fifth wall is connected to the second wall, and the other end is connected to the third wall. The fifth wall divides the receiving groove into a plurality of sub-receiving grooves arranged along the second direction, and each sub-receiving groove is used to place a corresponding battery cell.

9. The liquid injection device according to claim 1, characterized in that: The injection device also includes a controller and an alarm. The first detection element and the alarm signal are respectively connected to the controller. The controller is used to receive and process the detection information of the first detection element. The controller is used to control the alarm to output alarm information.

10. The liquid injection device according to claim 1, characterized in that: The main body has a plurality of side walls, which are sequentially arranged around the central axis of the main body, the first wall is the side wall, the number of the limiting members is multiple, and each limiting member is correspondingly arranged on one of the side walls; The liquid injection equipment has a material receiving station and a liquid injection station, the liquid injection component is arranged at the liquid injection station, and the liquid injection equipment also includes a second driving component, which is used to drive the main body to rotate around the central axis of the main body to rotate the conveying component at the material receiving station to the liquid injection station.

11. The liquid injection device according to claim 1, characterized in that: The liquid injection equipment has a material receiving station and a liquid injection station, the main body includes a plurality of the first walls, and the liquid injection equipment also includes a conveying mechanism, the conveying mechanism is used to convey the conveying member to the material receiving station, the conveying member cooperates with one of the plurality of the first walls at the material receiving station to make the conveying member contact with the corresponding limiting member.

12. A battery production line, characterized in that: Comprising a liquid injection device as described in any one of claims 1-11.

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