Electrolyte injection system and electrolyte injection method

Abstract

An electrolyte injection system (100) and an electrolyte injection method. The electrolyte injection system (100) comprises rotating devices (1), electrolyte injection devices, electrolyte preparation mechanisms (3), loading and unloading stations (4), electrolyte replenishment buffer stations (5), transferring mechanisms, a first weighing device (61), a second weighing device (62) and a control apparatus. The rotating devices (1) are each provided with a plurality of circumferentially arranged battery (200) placement positions capable of rotating and shifting. The electrolyte injection devices are arranged at the battery (200) placement positions, and are configured to inject electrolyte into batteries (200) at the battery (200) placement positions. The electrolyte preparation mechanisms (3) are configured to prepare electrolyte for the electrolyte injection devices passing through electrolyte preparation areas of the electrolyte preparation mechanisms (3). The loading and unloading stations (4) are configured to place batteries (200) to be injected with electrolyte and batteries (200) after electrolyte injection. The electrolyte replenishment buffer stations (5) are configured to buffer batteries (200) to be replenished with electrolyte. The transferring mechanisms are configured to move batteries (200). The first weighing device (61) is configured to weigh the batteries (200) after electrolyte injection. The second weighing device (62) is configured to weigh the batteries (200) to be injected with electrolyte.

Description

Liquid injection system and liquid injection method

[0001] Cross Reference to Related Applications

[0002] The present disclosure is based on and claims priority to Chinese Patent Application No. 202410452923.4, filed on April 16, 2024, entitled “Liquid injection system and liquid injection method”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of battery production equipment, in particular to a liquid injection system and a liquid injection method. BACKGROUND

[0004] This section is intended to provide background or context to the embodiments of the present disclosure. The description herein is not admitted to be prior art merely by inclusion in this section.

[0005] In the production process of a battery, processes such as liquid injection and sealing are usually required. The liquid injection process refers to injecting electrolyte into the interior of the battery through a liquid injection hole provided on the battery. In the related art, the liquid injection equipment has low automation degree, low production efficiency, and high labor cost.

[0006] SUMMARY

[0007] Therefore, the embodiments of the present disclosure aim to provide a liquid injection system and a liquid injection method, which can improve the automation degree and production efficiency, and reduce the labor cost.

[0008] To achieve the above-mentioned purpose, a first aspect of the embodiments of the present disclosure provides a liquid injection system, comprising:

[0009] A rotating device is provided with a plurality of battery placing positions arranged along the circumference and capable of rotating displacement, the battery placing positions are used for placing batteries, and each battery placing position passes through an in-out position, a liquid preparation position, at least one static buffer position in turn by rotating displacement and returns to the in-out position;

[0010] A liquid injection device is provided for each battery placing position, and the liquid injection device is configured to inject liquid into the battery placed in the battery placing position;

[0011] A liquid preparation mechanism is provided on the circumferential outer side of the rotating device, and the liquid preparation mechanism is configured to prepare liquid for the liquid injection device provided in the battery placing position at the liquid preparation position;

[0012] An in-out station is provided on the circumferential outer side of the rotating device, and the in-out station is configured to place batteries to be injected and batteries after liquid injection;

[0013] A liquid supplement buffer station is configured to buffer batteries to be supplemented with liquid;

[0014] The transfer mechanism is configured to move the battery after liquid injection from the battery placement position at the in-out material position to the loading and unloading station, and move the battery to be injected from the loading and unloading station to the battery placement position at the in-out material position, or move the battery to be supplemented from the liquid supplement buffer station to the battery placement position at the in-out material position;

[0015] The first weighing device is configured to weigh the battery after liquid injection;

[0016] The second weighing device is configured to weigh the battery to be injected;

[0017] The control device is configured to control the second weighing device to weigh the battery to be injected, then control the transfer mechanism to move the battery to be injected at the loading and unloading station to the battery placement position at the in-out material position, control the rotating device to rotate the battery placement position, control the liquid preparation mechanism to prepare liquid for the liquid injection device equipped in the battery placement position at the liquid preparation position, control the liquid injection device after liquid preparation to inject the battery at the battery placement position before the battery placement position rotates back to the in-out material position, control the transfer mechanism to move the battery after liquid injection from the battery placement position to the loading and unloading station, then control the first weighing device to weigh the battery after liquid injection, and further control the transfer mechanism to move the battery to be supplemented at the liquid supplement buffer station to the battery placement position at the in-out material position without placing the battery.

[0018] The liquid injection system of the embodiment of the present disclosure, on the one hand, controls the transfer mechanism to move the battery to be injected at the loading and unloading station to the battery placement position, or move the battery to be supplemented at the liquid supplement buffer station to the battery placement position, then controls the rotating device to rotate the battery placement position with the battery, and controls the liquid preparation mechanism to prepare liquid for the liquid injection device, to realize automatic liquid preparation. After automatic liquid preparation is completed, the liquid injection device is controlled to complete the injection of the battery at the battery placement position before rotating back to the loading and unloading position, thereby realizing full-automatic injection of the battery, improving the automation degree of battery liquid injection, improving production efficiency, and reducing labor cost. On the other hand, by setting the first weighing device for weighing the battery after liquid injection and transferring the battery to be supplemented after weighing to the liquid supplement buffer station, the battery can be automatically supplemented while improving the yield, thereby further improving the automation degree of battery liquid injection.

[0019] In some embodiments, the liquid injection system comprises a feeding detection device, and the control device is capable of controlling the feeding detection device to detect the battery passing through a detection area of the feeding detection device. The feeding detection device comprises a second weighing device configured to weigh the battery to be injected with liquid passing through a weighing area of the second weighing device. In the case that the difference between the weight of the battery after injection detected by the first weighing device and the weight of the battery to be injected detected by the second weighing device does not reach a specified amount for the same battery, the control device controls the robot to transfer the battery to a liquid supplement buffer station.

[0020] In this embodiment, the feeding detection device is configured to detect the battery passing through a detection area of the feeding detection device, which is beneficial to timely find out whether the battery to be injected with liquid is qualified, thereby improving the production efficiency of the battery. The second weighing device is used to automatically weigh the battery, i.e., the weight of the battery before injection can be obtained, and then the battery after injection is weighed by the first weighing device. The weight of the battery after injection detected by the first weighing device is subtracted from the weight of the battery before injection detected by the second weighing device to obtain the injection amount of the battery, so as to confirm whether the injection amount of the battery meets the standard.

[0021] In some embodiments, the liquid injection system comprises a robot, a feeding pull belt having a feeding position, and a discharging pull belt having a discharging position. The feeding detection device is arranged on one side of the feeding pull belt. The control device controls the robot to transfer the qualified battery at the feeding position to the feeding and discharging station and transfer the battery after injection at the feeding and discharging station to the discharging position.

[0022] Exemplarily, the robot is a six-axis robot. Compared with the coordinate axis feeding and discharging, the flexibility of the six-axis robot is high, and the robot is more stable and reliable during the transfer process. By arranging the robot, the qualified battery at the feeding position is transferred to the feeding and discharging station, and the battery after injection at the feeding and discharging station is transferred to the discharging position, which is beneficial to realize the automatic operation of the machine and reduce the labor cost.

[0023] In some embodiments, the feeding detection device further comprises a first code scanning device, and the control device controls the first code scanning device to scan the code of the battery passing through a code scanning area of the first code scanning device.

[0024] The first code scanning device is used to automatically scan the code of the battery, which is beneficial to identify and bind the information of the battery, so as to realize the tracking and recording of the battery during the whole injection process and improve the reliability of the injection.

[0025] In some embodiments, the feeding detection device further comprises a short-circuit testing device, and the control device controls the short-circuit testing device to perform short-circuit test on the battery passing through a testing area of the short-circuit testing device.

[0026] The short circuit testing device is used for automatically testing the battery in short circuit, which is beneficial to picking out the battery with internal short circuit problem in time before liquid injection, improving the problem of substandard products flowing to the terminal, and improving the yield of the battery.

[0027] In some embodiments, the liquid injection system comprises a feeding buffer pull belt, and the control device controls the robot to transfer the battery that fails the feeding detection to the feeding buffer pull belt.

[0028] The feeding buffer pull belt is used for buffering the substandard battery, without stopping the line for processing, and without causing the problem of substandard products flowing to the terminal, which is beneficial to improving the degree of automation and production efficiency.

[0029] In some embodiments, the liquid injection system comprises a feeding pairing station, the control device controls the robot to transfer the battery pack that fails the feeding detection to the feeding pairing station, the battery pack that fails the feeding detection comprises at least one substandard battery, and the control device controls the robot to transfer the substandard battery in the feeding pairing station to the feeding buffer pull belt and the qualified battery in the feeding pairing station to the feeding and discharging station.

[0030] In this embodiment, by providing the feeding pairing station, when the robot picks up the battery, if there is a substandard product, the robot transfers the battery pack containing the substandard battery to the feeding pairing station, and then puts the substandard product in the battery pack into the feeding buffer pull belt. In the case that the entire battery pack is qualified, the entire battery pack is put into the liquid injection clamp. When the number of batteries in the feeding pairing station meets the number of batteries that can be picked up by the robot at one time, the robot preferentially picks up the batteries in the pairing mechanism and puts them into the liquid injection clamp, which is beneficial to emptying the feeding pairing station and improving the efficiency of the robot in filling the liquid injection clamp.

[0031] In some embodiments, the liquid injection system comprises a discharging detection device, the discharging detection device comprises a first weighing device arranged on one side of the discharging pull belt and a second code scanning device arranged on one side of the discharging pull belt, and the control device controls the second code scanning device to scan the code of the battery passing through the code scanning area of the second code scanning device.

[0032] The second code scanning device is used for automatically scanning the code of the battery after liquid injection, which is beneficial to identifying and binding the information of the battery after liquid injection, so as to realize tracking and recording of the battery during the entire liquid injection process and improve the reliability of liquid injection.

[0033] In some embodiments, the liquid injection system comprises a discharging buffer pull belt, and the control device controls the robot to transfer the battery that fails the discharging detection to the discharging buffer pull belt.

[0034] The discharging buffer pull belt is used for buffering the substandard battery after liquid injection, without stopping the line for processing, and without causing the problem of substandard products flowing to the terminal, which is beneficial to improving the degree of automation and production efficiency.

[0035] In some embodiments, the liquid injection system comprises a discharging and pairing station, and the control device controls the robot to transfer the battery pack with at least one unqualified battery detected by the discharging detection device to the discharging and pairing station, controls the robot to transfer the battery to be recharged in the discharging and pairing station to the recharging buffer station, controls the robot to transfer the unqualified battery other than the battery to be recharged in the discharging and pairing station to the discharging buffer belt, and controls the robot to transfer the qualified battery in the discharging and pairing station to the discharging belt.

[0036] In this embodiment, by providing the discharging and pairing station, when the robot picks up the battery, if there is a defective product, the robot transfers the battery pack containing the unqualified battery to the discharging and pairing station, transfers the battery to be recharged in the battery pack to the recharging buffer station, and transfers the unqualified battery other than the battery to be recharged in the battery pack (for example, a product with a code scanning defect or a battery with excessive liquid after liquid injection) to the discharging buffer belt. When the number of batteries in the discharging and pairing station meets the number of batteries picked up by the robot at one time, the robot preferentially picks up the batteries in the discharging and pairing station and places them in the discharging belt, which is beneficial to empty the discharging and pairing station and improve the picking efficiency of the robot. When the number of batteries in the recharging buffer station meets the number of batteries picked up by the robot at one time, the robot preferentially picks up the batteries in the recharging buffer station and places them in the liquid injection clamp of the battery placement position.

[0037] In some embodiments, the liquid injection system comprises a cleaning device arranged on one side of the discharging belt, and the control device can control the cleaning device to clean the battery passing through the cleaning area of the cleaning device.

[0038] The control device can control the cleaning device to wipe the liquid injection port of the battery passing through the cleaning area of the cleaning device to wipe off the electrolyte residue outside the liquid injection port.

[0039] In some embodiments, the liquid injection system comprises a liquid injection clamp configured to accommodate a battery to be injected, a battery to be recharged, or a battery after liquid injection, and a transfer mechanism for moving the liquid injection clamp accommodating the battery to be injected or the battery to be recharged to the battery placement position, or moving the liquid injection clamp accommodating the battery after liquid injection from the battery placement position to the feeding and discharging station.

[0040] The liquid injection clamp refers to a structure for accommodating a battery and can position the battery. In the process of liquid injection, the accommodating groove of the liquid injection clamp is used to carry the battery, and different mechanisms of the liquid injection system perform different treatments on the battery. Different batteries may require different liquid injection clamps, so different types of batteries can use different liquid injection clamps to carry the batteries.

[0041] In some embodiments, the liquid injection system comprises at least two rotating devices.

[0042] This helps improve the battery filling efficiency. In addition, the two rotary devices can share the loading and unloading pull belts and robots, which not only improves the filling efficiency but also reduces the number of parts and reduces costs.

[0043] In some embodiments, the rotary device includes at least two static buffer positions, each of which is spaced apart along the circumference of the rotary device.

[0044] This helps to improve the battery filling efficiency and increase production speed.

[0045] In some embodiments, the liquid injection system includes a residual liquid receiving mechanism arranged on the circumferential outer side of the rotating device. Each battery placement position passes through the input and output position, the reserve liquid position, at least one static buffer position, the residual liquid receiving position and returns to the input and output position through rotation and displacement. The control device controls the residual liquid receiving mechanism to clean the residual electrolyte in the liquid injection cup of the liquid injection device for the battery placement position located at the residual liquid receiving position.

[0046] This can improve the problem of inaccurate filling amount of the next round of batteries due to residual electrolyte in the filling cup. In addition, the residual liquid receiving mechanism can also be used to hold residual electrolyte, which can improve the problem of electrolyte dripping onto the outside of the residual liquid receiving mechanism, which is conducive to maintaining cleanliness and hygiene.

[0047] In some embodiments, the liquid injection system includes at least two rotating devices, and the liquid replenishment buffer station is arranged between the at least two rotating devices.

[0048] This facilitates the two rotary devices to share the liquid replenishment buffer station.

[0049] In some embodiments, the injection system includes at least two rotating devices, the robot is located between the at least two rotating devices, and between the liquid replenishment buffer station and the unloading pull belt; the arrangement direction of the loading pull belt and the unloading pull belt is the same as the arrangement direction of the at least two rotating devices, and the loading pull belt and the unloading pull belt are located on the same side of the at least two rotating devices.

[0050] This helps the robot to move in a shorter path and also facilitates the sharing of robots.

[0051] A second aspect of the embodiments of the present disclosure provides a liquid injection method, which is applied to a liquid injection system for injecting liquid into a battery. The liquid injection system includes a control device, a rotary device, a liquid injection device, a liquid preparation mechanism, a loading and unloading station, a liquid replenishment buffer station, a transfer mechanism, a first weighing device, and a second weighing device. The rotary device is provided with a plurality of static station battery placement positions arranged along a circumferential direction and capable of rotation and displacement. The battery placement positions are used to place batteries. Each battery placement position passes through an inlet and outlet position, a liquid preparation position, at least one static buffer position, and returns to the inlet and outlet position in sequence through rotation and displacement. The liquid injection method includes:

[0052] The control device controls the second weighing device to weigh the battery to be injected with liquid; and the control device controls the transfer mechanism to transfer the battery to be injected with liquid at the loading and unloading station or the battery to be supplemented with liquid at the liquid supplement buffer station to the battery placement position of the rotating device;

[0053] The control device controls the rotating device to rotate the battery placement position, and in response to the battery to be injected with liquid or the battery to be supplemented with liquid moving to the liquid preparation position, the control device controls the liquid preparation mechanism to prepare liquid for the liquid injection device arranged at the battery placement position of the liquid preparation position, and controls the liquid injection device to perform vacuum extraction on the battery;

[0054] In response to completion of the liquid preparation, the control device controls the rotating device to rotate the battery placement position, and controls the liquid injection device to inject liquid into the battery before the battery placement position rotates back to the loading and unloading position;

[0055] In response to completion of the liquid injection, the control device controls the first weighing device to weigh the battery after the liquid injection that has moved out of the battery placement position, and transfers the battery to be supplemented with liquid after the weighing to the liquid supplement buffer station.

[0056] The liquid injection method of the embodiment of the present disclosure, on the one hand, the control device controls the transfer mechanism to move the battery to be injected with liquid at the loading and unloading station to the battery placement position, or to move the battery to be supplemented with liquid at the liquid supplement buffer station to the battery placement position, then controls the rotating device to rotate the battery placement position with the battery, and controls the liquid preparation mechanism to prepare liquid for the liquid injection device, to realize automatic liquid preparation, after the automatic liquid preparation is completed, the liquid injection device is controlled to inject liquid into the battery at the battery placement position before the battery placement position rotates back to the loading and unloading position, thereby realizing full-automatic liquid injection for the battery, improving the automation degree of the battery liquid injection, improving the production efficiency, and reducing the labor cost. On the other hand, by arranging the first weighing device to weigh the battery after the liquid injection and transfer the battery to be supplemented with liquid after the weighing to the liquid supplement buffer station, the good product rate is improved, and automatic liquid supplement for the battery is realized, further improving the automation degree of the battery liquid injection.

[0057] In some embodiments, the liquid injection system comprises a loading pull belt, a loading buffer pull belt, and a loading detection device arranged on one side of the loading pull belt, before the control device controls the transfer mechanism to transfer the battery to be injected with liquid or the battery to be supplemented with liquid at the liquid supplement buffer station to the battery placement position of the rotating device, comprising:

[0058] The control device controls the loading pull belt to convey the battery to be injected with liquid;

[0059] The control device controls the loading detection device to detect the battery passing through the detection area of the loading detection device, and transfers the battery that passes the detection to the loading and unloading station, and transfers the battery that fails the detection to the loading buffer pull belt.

[0060] In some embodiments, the liquid injection system comprises a feeding matching station, the battery passing the detection is transferred to the feeding and discharging station, and the battery failing the detection is transferred to the feeding buffer pull belt, which comprises:

[0061] The control device transfers the battery pack passing the detection to the feeding and discharging station, and transfers the battery pack failing the detection to the feeding matching station, wherein the battery pack failing the detection comprises at least one battery failing the detection.

[0062] The control device transfers the battery failing the detection in the feeding matching station to the feeding buffer pull belt, and if the number of batteries passing the detection in the feeding matching station reaches a preset number, the control device transfers the batteries to the feeding and discharging station.

[0063] In some embodiments, the control device controls the feeding detection device to detect the battery passing the detection area of the feeding detection device, which comprises:

[0064] The feeding detection device comprises a second weighing device, and the control device controls the second weighing device to weigh the battery passing the weighing area of the second weighing device; and / or,

[0065] The feeding detection device comprises a short circuit test device, and the control device controls the short circuit test device to perform short circuit test on the battery passing the test area of the short circuit test device; and / or,

[0066] The feeding detection device comprises a first code scanning device, and the control device controls the first code scanning device to scan the code of the battery passing the code scanning area of the first code scanning device. BRIEF DESCRIPTION OF DRAWINGS

[0067] FIG. 1 is a structural schematic diagram of a liquid injection system according to an embodiment of the present disclosure;

[0068] FIG. 2 is a structural schematic diagram of a liquid injection clamp according to an embodiment of the present disclosure;

[0069] FIG. 3 is a schematic diagram of an implementation process of a liquid injection method according to an embodiment of the present disclosure;

[0070] FIG. 4 is another schematic diagram of an implementation process of a liquid injection method according to an embodiment of the present disclosure;

[0071] FIG. 5 is still another schematic diagram of an implementation process of a liquid injection method according to an embodiment of the present disclosure;

[0072] FIG. 6 is yet another schematic diagram of an implementation process of a liquid injection method according to an embodiment of the present disclosure.

[0073] Explanation of reference signs 1, rotating device; 1a, battery placement position; 10a, feeding and discharging position; 10b, standby liquid position; 10c, standing buffer position; 10d, residual liquid receiving position; 2, liquid injection clamp; 2a, accommodating groove; 3, standby liquid mechanism; 4, feeding and discharging station; 5, liquid supplementing buffer station; 6, discharging detection device; 61, first weighing device; 62, second code scanning device; 7, feeding detection device; 71, first code scanning device; 72, second weighing device; 73, short circuit testing device; 8, robot; 9, feeding pull belt; 9a, material taking position; 11, discharging pull belt; 11a, discharging position; 12, feeding buffer pull belt; 13, feeding pairing station; 14, discharging buffer pull belt; 15, discharging pairing station; 16, cleaning device; 17, residual liquid receiving mechanism; 100, liquid injection system; 200, battery. DETAILED DESCRIPTION

[0074] It should be noted that the embodiments and technical features in the present disclosure and the technical features in the embodiments can be combined with each other without conflict, and the detailed description in the specific embodiments should be understood as an explanation and illustration of the purpose of the present disclosure, and should not be regarded as an improper limitation of the present disclosure.

[0075] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure; the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0076] In the description of the embodiments of the present disclosure, the technical terms "first", "second", and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present disclosure, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0077] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present disclosure. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0078] In the description of the embodiments of the present disclosure, the term "and / or" is merely an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0079] In the description of the embodiments of the present disclosure, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", "height direction", "first direction", "second direction" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, operate or be used in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present disclosure.

[0080] In the description of the embodiments of the present disclosure, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0081] In the description of the embodiments of the present disclosure, unless otherwise explicitly specified and limited, the technical term "contact" should be understood in a broad sense, which can be direct contact or contact through an intermediate medium layer, and can be contact between two objects in contact without interaction force, or contact between two objects in contact with interaction force.

[0082] With the development of clean energy, more and more equipment uses electric energy as driving energy, and then as power battery which can store more electric energy and can be charged and discharged repeatedly, such as lithium ion battery. Among them, the power battery is not only applied to energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, and aerospace and other fields.

[0083] The battery mentioned in the embodiments of the present disclosure is used to form a battery device, which includes one or more battery monomers to provide a single physical module with higher voltage and capacity. For example, the battery device mentioned in the present disclosure can include a battery module or a battery pack, etc. The battery device generally includes a box for packaging one or more battery monomers. The box can avoid the influence of liquid or other foreign matters on the charging or discharging of the battery monomers.

[0084] In the present disclosure, the battery monomer can 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 disclosure are not limited thereto. The battery monomer can be in the shape of a cylinder, a cuboid, or other shapes, etc., and the embodiments of the present disclosure are not limited thereto.

[0085] The battery monomer includes an electrode assembly and an electrolyte, the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator film; the electrolyte plays a role of conducting ions between the positive and negative electrode sheets. The battery monomer mainly works by relying on the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode current collector, the positive electrode current collector without the positive electrode active material layer protrudes from the positive electrode current collector with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer serves as a positive electrode tab. Taking a lithium ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer is coated on the surface of the negative electrode current collector, the negative electrode current collector without the negative electrode active material layer protrudes from the negative electrode current collector with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that no fuse occurs when passing a large current, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The material of the separator film can be PP (polypropylene) or PE (polyethylene), etc.

[0086] The battery monomer also includes an insulating film and a shell, the insulating film is wrapped on the outside of the electrode assembly, and the shell encapsulates the electrode assembly wrapped with the insulating film to form the battery monomer. The insulating film can be a mylar film, and the shell can be an aluminum shell. After the electrode assembly is wound into a shape, the encapsulation of the mylar film and the shell is completed through a mylar film wrapping process and a shell insertion process. Among them, the mylar film plays a role of sealing and protecting the electrode assembly, and the mylar film can effectively insulate the electrode assembly and the shell from each other to avoid internal short circuit of the battery monomer. The shell plays a protective role.

[0087] After the casing process, a liquid injection process of injecting electrolyte into the outer shell is usually performed. The liquid injection process is an important link in the battery manufacturing process, and the injection precision directly relates to the cycle performance and consistency of lithium ions. In the related art, the liquid injection equipment has low automation degree, low production efficiency and high labor cost. It should be noted that the battery in the liquid injection process can be in an intermediate state before forming a battery monomer product in the battery device.

[0088] In order to improve the degree of automation and production efficiency, and reduce labor costs, referring to FIG. 1 and FIG. 2, the disclosure provides a liquid injection system for injecting liquid into a battery 200, the liquid injection system 100 comprising a rotating device 1, a liquid injection device, a liquid preparation mechanism 3, an upper and lower material station 4, a liquid supplement buffer station 5, a transfer mechanism, a first weighing device 61, a second weighing device 72, and a control device. The rotating device 1 is provided with a plurality of battery placement positions 1a, the plurality of battery placement positions 1a are arranged along the circumference and can be rotationally displaced, and the battery placement positions 1a are used for placing batteries 200. Each battery placement position 1a passes through an in-out material position 10a, a liquid preparation position 10b, at least one static buffer position 10c, and returns to the in-out material position 10a in sequence by rotationally displacing. Each battery placement position 1a is respectively provided with a liquid injection device, and the liquid injection device is configured to inject liquid into the battery 200 on the battery placement position 1a. The liquid preparation mechanism 3 is arranged on the circumferential outer side of the rotating device 1, and the liquid preparation mechanism 3 is configured to prepare liquid for the liquid injection device provided on the battery placement position 1a located at the liquid preparation position (i.e., the liquid injection device passing through the liquid preparation area of the liquid preparation mechanism 3). The upper and lower material station 4 is arranged on the circumferential outer side of the rotating device 1, and the upper and lower material station 4 is configured to place the battery 200 to be injected and the battery 200 after injection. The liquid supplement buffer station 5 is configured to buffer the battery 200 to be supplemented with liquid. The transfer mechanism is configured to move the battery 200 after injection from the battery placement position 1a located at the in-out material position 10a to the upper and lower material station 4, and move the battery 200 to be injected from the upper and lower material station 4 to the battery placement position 1a located at the in-out material position 10a, or move the battery 200 to be supplemented with liquid from the liquid supplement buffer station 5 to the battery placement position 1a located at the in-out material position 10a. The second weighing device 72 is configured to weigh the battery 200 to be injected. The first weighing device 61 is configured to weigh the battery 200 after injection. The control device is configured to control the second weighing device 72 to weigh the battery to be injected, then control the transfer mechanism to move the battery 200 to be injected located at the upper and lower material station 4 to the battery placement position 1a located at the in-out material position 10a, control the rotating device 1 to rotationally displace the battery placement position 1a, and control the liquid preparation mechanism 3 to prepare liquid for the liquid injection device provided on the battery placement position 1a rotationally displaced to the liquid preparation position 10b, and control the liquid injection device after liquid preparation to inject liquid into the battery 200 on the battery placement position 1a before the battery placement position 1a rotationally returns to the in-out material position 10a. The control device controls the transfer mechanism to move the battery 200 after injection rotationally returned to the in-out material position 10a from the battery placement position 1a to the upper and lower material station 4, then controls the first weighing device 61 to weigh the battery 200 after injection, and further controls the transfer mechanism to move the battery 200 to be supplemented with liquid from the liquid supplement buffer station 5 to the battery placement position 1a located at the in-out material position 10a and not placed with the battery 200 after weighing.

[0089] Exemplarily, the rotary device 1 is provided with at least two battery placing positions (static positions) 1a, each of the battery placing positions 1a is arranged along the circumference of the rotary device 1, and the battery placing position 1a is configured to mount a liquid injection clamp 2 used for accommodating a battery 200, so as to perform vacuumizing, staticizing and other steps on the battery 200 on the liquid injection clamp 2. Each of the battery placing positions 1a is arranged along the circumference of the rotary device 1, so that the rotary device 1 can drive the liquid injection clamp 2 in the battery placing position 1a to circulate along the circumference of the rotary device 1 by rotating, so as to schedule the battery placing position 1a and perform different steps, and finally complete the liquid injection.

[0090] The rotary device 1 is provided with at least two battery placing positions 1a, which means that the number of the battery placing positions 1a is two or more. Exemplarily, the number of the battery placing positions 1a can be 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 or 13, etc.

[0091] By arranging at least two battery placing positions 1a, while the battery 200 is being fed or discharged, liquid preparation, vacuumizing and staticizing at the feeding and discharging position 4, the liquid injection device on each of the remaining battery placing positions 1a can perform liquid injection on the battery 200, for example, positive and negative pressure cycle liquid injection, which is beneficial to the full absorption of the electrolyte, saves time and improves production efficiency. Here, for the convenience of description, the position of the battery placing position 1a where the battery 200 on the battery placing position can be fed or discharged can be referred to as the feeding and discharging position, the position of the battery placing position 1a where the liquid injection device on the battery placing position can perform liquid injection (including vacuumizing) can be referred to as the liquid preparation position, and the position of the battery placing position 1a after rotating through the liquid preparation position can be referred to as the static buffer position.

[0092] In some specific embodiments, each of the battery placing positions 1a can be configured such that when one of the battery placing positions 1a is located at the feeding and discharging position 10a, the other battery placing positions 1a are located at the liquid preparation position 10b and the static buffer position 10c, respectively.

[0093] It should be noted that the plurality of the embodiments of the present disclosure means two or more.

[0094] In other embodiments, the number of the rotary device 1 can also be one.

[0095] In some embodiments, referring to FIG. 1 and FIG. 2, the liquid injection system 100 comprises a liquid injection clamp 2. The liquid injection clamp 2 is configured to accommodate a battery 200 to be injected or to be replenished. A transfer mechanism is configured to move the liquid injection clamp 2 accommodating the battery 200 to be injected or to be replenished to a battery placement position la. The liquid injection clamp 2 can also accommodate the battery 200 after injection, and is configured to move the battery 200 after injection from the battery placement position to a loading and unloading station 4. The battery placement position la can be a position where the liquid injection clamp 2 is placed.

[0096] The liquid injection clamp 2 refers to a structure for accommodating the battery 200 and is capable of positioning the battery 200. During the injection process, the battery 200 is carried by a receiving groove 2a of the liquid injection clamp 2, and different mechanisms of the liquid injection system 100 perform different treatments on the battery 200. Different batteries 200 can require different liquid injection clamps 2, and thus different liquid injection clamps 2 can be replaced to accommodate different types of batteries 200.

[0097] Exemplarily, the rotary device 1 comprises a mounting bracket, a rotating disc rotatably arranged on the mounting bracket, and a driving member for driving the rotating disc to rotate. In some embodiments, the rotary device 1 is also referred to as a rotating tower.

[0098] Here, the rotating disc is driven by the driving member to rotate horizontally, and the rotating direction of the rotating disc can be counterclockwise or clockwise. The battery placement position la can be a position on the rotating disc where the battery (placed by the liquid injection clamp 2) can be placed. The rotating disc is driven by the driving member to rotate, so that the battery placement position la of the rotary device 1 rotates.

[0099] Exemplarily, the driving member is, for example, a motor.

[0100] Exemplarily, each battery placement position la is provided with a liquid injection device corresponding thereto, and the liquid injection device is configured to inject the battery 200 on the battery placement position la corresponding thereto, at this time, the battery placement position la is located at a liquid preparation position.

[0101] The liquid preparation mechanism 3 is configured to prepare liquid for the liquid injection device passing through the liquid preparation area of the liquid preparation mechanism 3. Exemplarily, the control device controls the battery placement position la accommodating the battery 200 to be injected to rotate to the liquid preparation position, the liquid injection device corresponding to the battery placement position la is located at the liquid preparation area, the control device controls the liquid preparation mechanism 3 to inject a certain amount of electrolyte into the liquid injection cup of the liquid injection device, and the liquid injection cup is configured to inject the battery 200. Exemplarily, the liquid injection device can use positive and negative pressure circulation injection.

[0102] The up-and-down feeding station 4 is configured to place the battery 200 to be injected with liquid and the battery 200 after being injected with liquid, that is, the up-and-down feeding station 4 is used to place the liquid injection clamp 2, and the liquid injection clamp 2 is used to accommodate the battery 200 to be injected with liquid or the battery 200 to be supplemented with liquid, or the liquid injection clamp 2 is used to place the battery 200 after being injected with liquid.

[0103] Optionally, the liquid injection system comprises a downfeed detection device 6, which is used to detect the battery 200 after being injected with liquid to detect whether the battery 200 is qualified.

[0104] Referring to FIG. 1, the first weighing device 61 is configured to weigh the battery 200 after being injected with liquid to confirm whether the injection amount of the battery 200 meets the standard, and if the injection amount is less, the unqualified battery 200 is transferred to the liquid supplement buffer station 5, if the injection amount is more, the unqualified battery 200 is transferred to the downfeed buffer pull belt 14, and if the injection amount meets the standard, the qualified battery 200 is transported to the next process, thereby realizing automatic liquid supplement of the battery 200.

[0105] Optionally, the first weighing device 61 can be equipped in the downfeed detection device 6. It should be noted that the specific structure of the first weighing device 61 is not limited here, as long as it can automatically weigh the battery 200.

[0106] The liquid injection system of the embodiment of the present disclosure, on the one hand, controls the transfer mechanism to move the battery 200 to be injected with liquid at the up-and-down feeding station 4 to the battery placement position 1a, or move the battery 200 to be supplemented with liquid at the liquid supplement buffer station 5 to the battery placement position 1a, then controls the rotary device 1 to rotate, and controls the liquid preparation mechanism 3 to prepare liquid for the liquid injection device to realize automatic liquid preparation, after the automatic liquid preparation is completed, the battery 200 at the battery placement position 1a is injected with liquid by the liquid injection device before the rotation returns to the up-and-down feeding position, thereby realizing full-automatic liquid injection of the battery 200, improving the automation degree of the battery 200 liquid injection, improving the production efficiency, and reducing the labor cost. On the other hand, by providing the first weighing device 61, the battery 200 after being injected with liquid is weighed, and the battery 200 to be supplemented with liquid after being weighed is transferred to the liquid supplement buffer station 5, thereby improving the yield while realizing automatic liquid supplement of the battery 200, and further improving the automation degree of the battery 200 liquid injection.

[0107] In some embodiments, referring to FIGS. 1 and 2, the liquid injection system 100 comprises a robot 8, an upfeed pull belt 9 with a taking position 9a, and a downfeed pull belt 11 with a downfeed position 11a. The control device can control the robot 8 to transfer the qualified battery 200 at the taking position 9a to the up-and-down feeding station 4, and transfer the battery 200 after being injected with liquid at the up-and-down feeding station 4 to the downfeed position 11a.

[0108] It should be noted that the specific type and position of the robot 8 is not limited here, as long as it can transfer the qualified battery 200 at the taking position 9a to the loading and unloading station 4, and transfer the battery 200 after being injected at the loading and unloading station 4 to the discharging position 11a. Of course, the robot 8 can also have other functions.

[0109] Here, the loading pull belt 9 is used for loading the battery 200. Exemplarily, the loading pull belt 9 includes a first end and a second end along the conveying direction. The first end of the loading pull belt 9 is the feeding end, and the second end of the loading pull belt 9 is the taking position 9a. The battery 200 to be injected enters from the feeding end, and the loading pull belt 9 conveys the battery 200 to be injected to the taking position 9a.

[0110] Here, the discharging pull belt 11 is used for discharging the battery 200. Exemplarily, the discharging pull belt 11 includes a first end and a second end along the conveying direction. The first end of the discharging pull belt 11 is the discharging position 11a, and the second end of the discharging pull belt 11 is the discharging end. The battery 200 after being injected enters from the discharging position 11a, and the discharging pull belt 11 conveys the battery 200 after being injected to the discharging end.

[0111] Please refer to FIG. 1 and FIG. 2. The robot 8 transfers the qualified battery 200 at the taking position 9a to the loading and unloading station 4, for example, to the injection clamp 2 on the loading and unloading station 4. The battery 200 after being injected at the loading and unloading station 4 is transferred to the discharging position 11a, for example, to the injection clamp 2 on the discharging position 11a.

[0112] Exemplarily, the robot 8 is a six-axis robot 8. Compared with the coordinate axis loading and unloading, the flexibility of the six-axis robot 8 is high, and it is more stable and reliable during the transfer process. By setting the robot 8, the qualified battery 200 at the taking position 9a is transferred to the loading and unloading station 4, and the battery 200 after being injected at the loading and unloading station 4 is transferred to the discharging position 11a, which is conducive to realizing automatic operation of the machine and reducing labor cost.

[0113] In some embodiments, please refer to FIG. 1. The injection system 100 includes a loading detection device 7 arranged on one side of the loading pull belt 9. The control device can control the loading detection device 7 to detect the battery 200 passing through the detection area of the loading detection device 7.

[0114] In this embodiment, by setting the loading detection device 7 to detect the battery 200 passing through the detection area of the loading detection device 7, it is beneficial to timely find out whether the battery 200 to be injected is qualified, thereby improving the production efficiency of the battery 200.

[0115] In some embodiments, referring to FIG. 1, the battery loading detection device 7 comprises a first code scanning device 71. The control device can control the first code scanning device 71 to scan the code of the battery 200 passing through the code scanning area of the first code scanning device 71.

[0116] It should be noted that the specific type of the first code scanning device 71 is not limited here. For example, a code scanning gun, a camera, etc.

[0117] The first code scanning device 71 is arranged on one side of the battery loading pull belt 9, which is conducive to scanning the code of the battery 200 passing through the code scanning area of the first code scanning device 71.

[0118] In this embodiment, by arranging the first code scanning device 71, the battery 200 is automatically scanned, which is conducive to identifying and binding the information of the battery 200, so as to realize the tracking and recording of the battery 200 during the entire liquid injection process, and improve the reliability of liquid injection.

[0119] In some embodiments, referring to FIG. 1, the battery loading detection device 7 comprises a second weighing device 72. The control device can control the second weighing device 72 to weigh the battery 200 passing through the weighing area of the second weighing device 72.

[0120] It should be noted that the specific structure of the second weighing device 72 is not limited here, as long as it can automatically weigh the battery 200.

[0121] The second weighing device 72 is arranged on one side of the battery loading pull belt 9, which is conducive to weighing the battery 200 passing through the weighing area of the second weighing device 72, and obtaining the weight of the battery 200 before liquid injection.

[0122] In this embodiment, by arranging the second weighing device 72, the battery 200 is automatically weighed, that is, the weight of the battery 200 before liquid injection can be obtained, and then the battery 200 after liquid injection is weighed by the first weighing device 61. The same battery 200 is weighed by the first weighing device 61 and the second weighing device 72, and the weight of the battery 200 after liquid injection weighed by the first weighing device 61 is subtracted from the weight of the battery 200 before liquid injection weighed by the second weighing device 72, so as to obtain the liquid injection amount of the battery 200, thereby confirming whether the liquid injection amount of the battery 200 meets the standard. If the liquid is less, the unqualified battery 200 is transferred to the liquid supplement buffer station 5, if the liquid is more, the unqualified battery 200 is transferred to the unloading buffer pull belt 14, and if the liquid injection amount meets the standard, the qualified battery 200 is transported to the next process, thereby realizing automatic liquid supplement of the battery 200, improving the reliability of battery 200 liquid injection and the yield of the battery 200. In addition, automatic liquid supplement of the battery 200 can also be realized, further improving the automation degree of battery 200 liquid injection.

[0123] In the related art, the battery needs to be baked before liquid injection, and after the battery is baked, the pole piece is fluffy, and some batteries have internal short circuit. The battery is not tested for short circuit before liquid injection, and there is a problem of defective products flowing to the terminal. The battery with internal short circuit cannot be identified after liquid injection, so the battery with internal short circuit problem needs to be picked out in advance before liquid injection.

[0124] In some embodiments, referring to FIG. 1, the feeding detection device 7 includes a short circuit test device 73. The control device can control the short circuit test device 73 to perform a short circuit test (Hi-pot, high potential) on the battery 200 passing through the test area of the short circuit test device 73.

[0125] It should be noted that the specific structure of the short circuit test device 73 is not limited here, as long as it can automatically perform a short circuit test on the battery 200.

[0126] The short circuit test device 73 is arranged on one side of the feeding pull belt 9, which is conducive to performing a short circuit test on the battery 200 passing through the test area of the short circuit test device 73.

[0127] In this embodiment, the short circuit test device 73 is arranged to automatically perform a short circuit test on the battery 200, which is conducive to picking out the battery 200 with internal short circuit problem in time before liquid injection, improving the problem of defective products flowing to the terminal, and improving the yield of the battery 200.

[0128] Exemplarily, the first code scanning device 71, the second weighing device 72, and the short circuit test device 73 are arranged in sequence along the conveying direction of the feeding pull belt 9.

[0129] Of course, the first code scanning device 71 and the second weighing device 72 can also be arranged at the same station, that is, the battery 200 can be scanned by the first code scanning device 71 and weighed by the second weighing device 72 at the same station.

[0130] In some embodiments, referring to FIG. 1, the liquid injection system 100 includes a feeding buffer pull belt 12, and the control device can control the robot 8 to transfer the battery 200 that fails the detection by the feeding detection device 7 to the feeding buffer pull belt 12.

[0131] Exemplarily, the battery 200 that fails the detection is, for example, a product with code scanning defects or a battery 200 with an internal short circuit problem.

[0132] The feeding buffer pull belt 12 can be arranged between the feeding pull belt 9 and the discharging pull belt 11.

[0133] In this embodiment, by setting the feeding buffer pull belt 12, unqualified batteries 200 are buffered, without stopping the line for processing, and without causing the flow of defective products to the terminal, which is conducive to improving the degree of automation and production efficiency.

[0134] In some embodiments, please continue to refer to FIG. 1, the liquid injection system 100 includes a feeding and pairing station 13. The control device can control the robot 8 to transfer the unqualified battery pack after being detected by the feeding detection device 7 to the feeding and pairing station 13, the unqualified battery pack containing at least one unqualified battery 200, and the control device can control the robot 8 to transfer the unqualified battery 200 on the feeding and pairing station 13 to the feeding buffer pull belt 12 and transfer the qualified battery 200 on the feeding and pairing station 13 to the feeding and discharging station 4.

[0135] It can be understood that, since the robot 8 can transfer multiple batteries 200 each time, for example, 4, 5, 6, 7, 8, 9, 10, etc. Thus, multiple batteries can be grouped, which is conducive to the grasping and transferring of the robot 8.

[0136] In this embodiment, by setting the feeding and pairing station 13, when the robot 8 grasps the battery 200, if the battery pack contains unqualified batteries 200, the robot 8 transfers the unqualified battery pack to the feeding and pairing station 13, and then puts the unqualified batteries 200 in the battery pack into the feeding buffer pull belt 12. In the case that the entire battery pack is qualified, the entire battery pack is put into the liquid injection clamp 2. When the number of batteries 200 on the feeding and pairing station 13 meets the number of single grasping of the robot 8, the robot 8 preferentially grasps the batteries 200 on the pairing mechanism and puts them into the liquid injection clamp 2, which is conducive to emptying the feeding and pairing station 13 and improving the efficiency of the robot 8 in filling the liquid injection clamp 2.

[0137] Of course, in other embodiments, when the battery pack contains unqualified batteries 200, the robot 8 puts the unqualified batteries 200 in the battery pack into the feeding buffer pull belt 12, and transfers the qualified batteries 200 on the feeding and pairing station 13 to the feeding and discharging station 4, without waiting until the number of batteries 200 on the feeding and pairing station 13 meets the number of single grasping of the robot 8.

[0138] In some embodiments, please continue to refer to FIG. 1, the liquid injection system includes a discharging detection device 6, which includes a first weighing device 61 arranged on one side of the discharging pull belt 11 and a second code scanning device 62 arranged on one side of the discharging pull belt 11. The control device can control the second code scanning device 62 to scan the code of the battery 200 passing through the code scanning area of the second code scanning device 62.

[0139] It should be noted that the specific type of the second code scanning device 62 is not limited herein. For example, it can be a code scanning gun, a camera, etc.

[0140] The first weighing device 61 and the second code scanning device 62 are arranged on one side of the discharging pull belt 11, which facilitates weighing the battery 200 passing through the weighing area during the discharging process and scanning the code of the battery 200 passing through the code scanning area of the second code scanning device 62.

[0141] In this embodiment, the second code scanning device 62 is arranged to automatically scan the code of the battery 200 after the battery is injected with liquid, which facilitates identifying and binding the information of the battery 200 after the battery is injected with liquid, so as to track and record the battery 200 during the whole injection process and improve the reliability of the injection.

[0142] In some embodiments, please continue to refer to FIG. 1, the injection system 100 comprises a discharging buffer pull belt 14, and the control device can control the robot 8 to transfer the battery 200 that fails to pass the discharging detection device 6 to the discharging buffer pull belt 14.

[0143] The discharging detection device 6 is used to detect the battery 200 after the battery is injected with liquid.

[0144] For example, the battery 200 that fails to pass the discharging detection device 6 is a product with a poor code scanning result or a battery 200 with excessive liquid after the battery is injected with liquid.

[0145] In this embodiment, the discharging buffer pull belt 14 is arranged to buffer the battery 200 that fails to pass the injection, so that the production line does not need to be stopped for processing, and the problem of flowing of the defective product to the terminal is avoided, which facilitates improving the degree of automation and production efficiency.

[0146] In some embodiments, please continue to refer to FIG. 1, the injection system 100 comprises a discharging matching station 15. The control device can control the robot 8 to transfer the battery pack that fails to pass the discharging detection device 6 to the discharging matching station 15, the battery pack comprises at least one battery 200 that fails to pass, the control device can control the robot 8 to transfer the battery 200 that needs to be supplemented with liquid on the discharging matching station 15 to the liquid supplement buffer station 5, transfer the battery 200 that fails to pass except the battery 200 that needs to be supplemented with liquid to the discharging buffer pull belt 14, and transfer the battery 200 that passes on the discharging matching station 15 to the discharging pull belt 11.

[0147] In this embodiment, by setting the discharging and pairing station 15, when the robot 8 picks up the battery pack containing unqualified batteries 200, the robot 8 transfers the unqualified battery pack to the discharging and pairing station 15, and transfers the batteries 200 to be rehydrated in the battery pack to the rehydration buffer station 5, and then transfers the unqualified batteries 200 (such as products with poor code scanning or batteries 200 with excessive liquid after rehydration) in the battery pack to the discharging buffer pull belt 14. When the number of batteries 200 on the discharging and pairing station 15 meets the single picking quantity of the robot 8, the robot 8 preferentially picks up the batteries 200 on the discharging and pairing station 15 and places them on the discharging pull belt, which is beneficial to empty the discharging and pairing station 15 and improve the picking efficiency of the robot 8. When the number of batteries 200 on the rehydration buffer station 5 meets the single picking quantity of the robot 8, the robot 8 preferentially picks up the batteries 200 on the rehydration buffer station 5 and places them in the rehydration clamp 2 of the battery placement position 1a.

[0148] Of course, in other embodiments, when there are unqualified batteries 200 in the battery pack, the robot 8 places the unqualified batteries 200 in the battery pack on the discharging buffer pull belt 14, and transfers the qualified batteries 200 on the discharging and pairing station 15 to the discharging pull belt, without waiting for the number of batteries 200 on the discharging and pairing station 15 to meet the single picking quantity of the robot 8 before picking. Also, without waiting for the number of batteries 200 on the rehydration buffer station 5 to meet the single picking quantity of the robot 8 before picking the batteries 200 on the rehydration buffer station 5 and placing them in the rehydration clamp 2 of the battery placement position 1a.

[0149] In some embodiments, please continue to refer to FIG. 1, the rehydration system 100 includes a cleaning device 16 arranged on one side of the discharging pull belt 11, and the control device can control the cleaning device 16 to clean the batteries 200 passing through the cleaning area of the cleaning device 16.

[0150] In this embodiment, by arranging the cleaning device 16 on one side of the discharging pull belt 11, after the rehydration of the electrolyte is completed, the control device can control the cleaning device 16 to wipe the rehydration port of the battery 200 passing through the cleaning area of the cleaning device 16, so as to wipe off the electrolyte residues outside the rehydration port.

[0151] Of course, the cleaning device 16 can also clean other parts of the battery 200 in addition to the rehydration port.

[0152] In some embodiments, please continue to refer to FIG. 1, the rehydration system 100 includes at least two rotary devices 1.

[0153] The injection system 100 comprises at least two rotating devices 1. It is referred to that the injection system 100 comprises a plurality of rotating devices 1. In the embodiments of the present disclosure, the injection system 100 comprising two rotating devices 1 (which can comprise two turrets) is taken as an example for description.

[0154] Exemplarily, the fully-automatic injection system 100 adopting the embodiments of the present disclosure can realize a single machine highest 16 PPM (16 products per minute).

[0155] In this embodiment, the injection system 100 is provided with two rotating devices 1, which is beneficial to improve the injection efficiency of the battery 200. The two rotating devices 1 can share the feeding pull belt 9, the discharging pull belt 11 and the robot 8, which reduces the number of components and the cost while improving the injection efficiency.

[0156] In some embodiments, referring to FIG. 1, the injection system 100 comprises a residual liquid receiving mechanism 17 arranged on the circumferential outer side of the rotating device 1, and the control device can control the residual liquid receiving mechanism 17 to clean the residual electrolyte in the injection cup of the injection device.

[0157] For the convenience of description, the position where the battery placing position 1a can be cleaned of residual liquid is referred to as a residual liquid receiving position. Each battery placing position 1a passes through the feeding and discharging position 10a, the liquid preparation position 10b, at least one static buffer position 10c, the residual liquid receiving position 10d in turn by rotating and shifting, and returns to the feeding and discharging position 10a. The control device controls the residual liquid receiving mechanism 17 to clean the residual electrolyte in the injection cup of the injection device for the battery placing position 1a located at the residual liquid receiving position 10d.

[0158] In some specific embodiments, each battery placing position 1a can be configured such that when one of the battery placing positions 1a is located at the feeding and discharging position 10a, the other battery placing positions 1a are located at the liquid preparation position 10b, the static buffer position 10c and the residual liquid receiving position 10d respectively.

[0159] Here, by arranging the residual liquid receiving mechanism 17, the control device can control the residual liquid receiving mechanism 17 to clean the residual electrolyte in the injection cup of the injection device, thereby improving the problem that the injection amount of the next round of battery 200 is inaccurate due to the residual electrolyte in the injection cup. In addition, the residual liquid receiving mechanism 17 can also be used to contain the residual electrolyte, which can improve the problem that the electrolyte drops outside the residual liquid receiving mechanism 17, and is beneficial to keep clean and hygienic.

[0160] The embodiments of the present disclosure provide an injection method applied to an injection system 100 for injecting a battery 200. As shown in FIGS. 1-2, the injection system 100 comprises a control device, a rotating device 1, an injection device, a liquid preparation mechanism 3, a feeding and discharging station 4, a liquid supplement buffer station 5, a transfer mechanism, a first weighing device 61 and a second weighing device 72.

[0161] FIG. 3 is a schematic diagram of an implementation flow of a liquid injection method according to an embodiment of the present disclosure. As shown in FIG. 3, the liquid injection method comprises the following steps S301 to S304:

[0162] In step S301, the control device controls the second weighing device to weigh the battery to be injected.

[0163] In step S302, the control device controls the transfer mechanism to transfer the battery to be injected or the battery to be supplemented in the supplement buffer station to the battery placement position of the rotary device.

[0164] Here, the control device is configured to control the operation of the rotary device 1, the liquid injection device, the liquid supplement mechanism 3, the transfer mechanism, and the first weighing device 61 and the second weighing device 72. The control device can include, but is not limited to, at least one of an industrial computer, a programmable logic controller (PLC), a host computer, and the like. The host computer can be, for example, a server, a notebook computer, a tablet computer, a desktop computer, a smart phone, and the like.

[0165] Referring to FIG. 1, the loading and unloading station 4 is arranged on the circumferential outer side of the rotary device 1, and is configured to place the battery 200 to be injected and the battery 200 after injection. The supplement buffer station 5 is configured to buffer the battery 200 to be supplemented. The transfer mechanism is configured to move the battery 200 after injection in the battery placement position la to the loading and unloading station 4, and move the battery 200 to be injected in the loading and unloading station 4 to the battery placement position la, or move the battery 200 to be supplemented in the supplement buffer station 5 to the battery placement position la.

[0166] Referring to FIG. 1, the rotary device 1 is provided with at least two battery placement positions la, and each battery placement position la is arranged along the circumferential direction of the rotary device 1. The battery placement position la is configured to install the liquid injection clamp 2 for accommodating the battery 200, so as to perform the steps of vacuumizing and standing still on the battery 200 in the liquid injection clamp 2. Each battery placement position la is arranged along the circumferential direction of the rotary device 1. In this way, the rotary device 1 can drive the liquid injection clamp 2 in the battery placement position la to circulate along the circumferential direction of the rotary device 1 by rotating, so as to schedule the battery placement position la, thereby performing different steps and finally completing the liquid injection.

[0167] The rotary device 1 is provided with at least two battery placement positions la, which means that the number of battery placement positions la is two or more. For example, the number of battery placement positions la can be 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, or 13, etc.

[0168] It should be noted that the plurality in the embodiments of the present disclosure means two or more.

[0169] In some embodiments, referring to FIG. 1 and FIG. 2, the liquid injection system 100 comprises a liquid injection clamp 2. The liquid injection clamp 2 is configured to accommodate the battery 200 to be injected or to be supplemented with liquid. The transfer mechanism is used to move the liquid injection clamp 2 accommodating the battery 200 to be injected or to be supplemented with liquid to the battery placement position 1a.

[0170] The liquid injection clamp 2 refers to a structure for accommodating the battery 200 and can position the battery 200. In the process of liquid injection, the battery 200 is carried by the accommodation groove 2a of the liquid injection clamp 2, and different mechanisms of the liquid injection system 100 process the battery 200 differently. Different batteries 200 may require different liquid injection clamps 2, so for different types of batteries 200, different liquid injection clamps 2 can be replaced to carry the battery 200.

[0171] Exemplarily, the rotary device 1 (for example, a turret) comprises a mounting bracket, a rotating disc rotatably arranged on the mounting bracket, and a driving member for driving the rotating disc to rotate.

[0172] Here, the rotating disc is driven by the driving member to rotate horizontally, and the rotating direction of the rotating disc can be counterclockwise or clockwise. The rotating disc is driven by the driving member to rotate, so that the battery placement position 1a rotates.

[0173] Exemplarily, the driving member is, for example, a motor.

[0174] In step S303, the control device controls the rotary device to rotate the battery placement position, and in response to the battery to be injected or to be supplemented with liquid moving to the liquid preparation position, the control device controls the liquid preparation mechanism to prepare liquid for the liquid injection device provided on the battery placement position at the liquid preparation position, and controls the liquid injection device to vacuumize the battery.

[0175] Exemplarily, the control device controls the driving member of the rotary device to drive the rotating disc to rotate, and as the rotating disc rotates, the battery placement position 1a rotates.

[0176] Exemplarily, each battery placement position 1a is provided with a liquid injection device corresponding thereto, and the liquid injection device is used to inject liquid into the battery 200 on the battery placement position 1a corresponding thereto.

[0177] The liquid preparation mechanism 3 is configured to prepare liquid for the liquid injection device passing through the liquid preparation area of the liquid preparation mechanism 3. Exemplarily, the control device controls the battery placement position 1a accommodating the battery 200 to be injected to rotate to the liquid preparation position, and the control device controls the liquid preparation mechanism 3 to inject a certain amount of electrolyte into the liquid injection cup of the liquid injection device, and the liquid injection cup is used to inject liquid into the battery 200.

[0178] Here, while the control device controls the liquid preparation mechanism 3 to prepare liquid for the liquid injection device located at the liquid preparation area (at this time, the battery placement position 1a is located at the liquid preparation position), the control device can also control the liquid injection device to perform vacuum extraction on the battery 200.

[0179] At step S304, in response to completion of the liquid preparation, the control device controls the rotating device to rotate the battery placement position 1a, and controls the liquid injection device to inject liquid into the battery before the battery placement position 1a rotates back to the in-out position 10a.

[0180] In this way, the liquid injection can be completed during the rotation of the battery placement position 1a from the in-out position 10a back to the in-out position 10a. For example, the liquid injection can be completed at the liquid preparation position, or during the rotation through the standing buffer position after the liquid preparation. By providing at least two battery placement positions 1a, while the in-out of the battery 200, the liquid preparation, the vacuum extraction, and the standing are performed at the in-out work station 4, the liquid injection device located at the remaining battery placement positions 1a can inject liquid into the battery 200, for example, to perform positive and negative pressure cyclic liquid injection, which is beneficial for the electrolyte to be fully absorbed, saves time, and improves production efficiency.

[0181] At step S305, in response to completion of the liquid injection, the control device controls the first weighing device 61 to weigh the battery after the liquid injection that is removed from the battery placement position 1a, and transfers the battery to be supplemented with liquid after the weighing to the liquid supplement buffer station.

[0182] Optionally, the in-out detection device 6 is configured to detect the battery 200 after the liquid injection to detect whether the battery 200 is qualified.

[0183] Referring to FIG. 1, the in-out detection device 6 can include the first weighing device 61 configured to weigh the battery 200 after the liquid injection to determine whether the liquid injection amount of the battery 200 meets the standard. If the liquid injection amount is less than the standard, the unqualified battery 200 is transferred to the liquid supplement buffer station 5; if the liquid injection amount is more than the standard, the unqualified battery 200 is transferred to the in-out buffer belt 14; and if the liquid injection amount meets the standard, the qualified battery 200 is transported to the next process, thereby realizing automatic liquid supplement for the battery 200.

[0184] It should be noted that the specific structure of the first weighing device 61 is not limited herein, as long as the first weighing device 61 can automatically weigh the battery 200.

[0185] In some embodiments, step S305 can include: in response to completion of the liquid injection, the control device controls the first weighing device 61 to weigh the battery after liquid injection which is moved out of the battery placing position la; and based on the difference between the weight of the battery weighed by the first weighing device 61 and the weight of the battery weighed by the second weighing device, it is determined whether the liquid injection amount of the battery 200 meets the standard; if the liquid injection amount is less than the standard, the unqualified battery 200 is transferred to the liquid supplement buffer station 5; if the liquid injection amount is more than the standard, the unqualified battery 200 is transferred to the unloading buffer pull belt 14; and if the liquid injection amount meets the standard, the qualified battery 200 is transported to the next process for subsequent processing.

[0186] The liquid injection method of the embodiments of the present disclosure, on the one hand, the control device controls the transfer mechanism to move the battery 200 to be injected in the battery placing position la from the battery loading and unloading station 4 or to move the battery 200 to be supplemented with liquid in the battery placing position la from the liquid supplement buffer station 5, then controls the rotary device 1 to rotate the battery placing position with the battery, and controls the liquid preparation mechanism 3 to prepare liquid for the liquid injection device, so as to realize automatic liquid preparation. After the automatic liquid preparation is completed, the liquid injection device is controlled to inject the battery 200 in the battery placing position la before returning to the feeding and discharging position 10a, so as to realize full-automatic liquid injection of the battery 200, improve the automation degree of the battery 200 liquid injection, improve the production efficiency, and reduce the labor cost. On the other hand, by setting the first weighing device 61, the battery 200 after liquid injection is weighed, and the battery 200 to be supplemented with liquid after weighing is transferred to the liquid supplement buffer station 5, so that the battery 200 can be automatically supplemented with liquid while improving the yield, and the automation degree of the battery 200 liquid injection is further improved.

[0187] In some embodiments, referring to FIG. 1, the liquid injection system 100 includes the feeding pull belt 9, the feeding buffer pull belt 12, and the feeding detection device 7 arranged on one side of the feeding pull belt 9.

[0188] The liquid injection method can further include the following steps S321 to S322:

[0189] Step S321: The control device controls the feeding pull belt to transport the battery to be injected.

[0190] Step S322: The control device controls the feeding detection device to detect the battery passing through the detection area of the feeding detection device, and transfers the battery passing the detection to the battery loading and unloading station, and transfers the battery failing the detection to the feeding buffer pull belt.

[0191] After step S321 and step S322, step S302 is performed, in which the control device controls the transfer mechanism to transfer the battery to be injected in the battery loading and unloading station or the battery to be supplemented with liquid in the liquid supplement buffer station to the battery placing position of the rotary device.

[0192] Here, the feeding pull belt 9 is used for feeding the battery 200. For example, the feeding pull belt 9 includes a first end and a second end in the conveying direction. The first end of the feeding pull belt 9 is the feeding end, and the second end of the feeding pull belt 9 is the taking position 9a. The battery 200 to be injected is fed from the feeding end to the taking position 9a by the feeding pull belt 9.

[0193] The robot 8 transfers the qualified battery 200 at the taking position 9a to the feeding and discharging station 4, for example, to the injection clamp 2 on the feeding and discharging station 4. The battery 200 after injection on the feeding and discharging station 4 is transferred to the discharging position 11a, for example, to the injection clamp 2 on the discharging position 11a.

[0194] In some embodiments, referring to FIG. 1, the injection system 100 includes the feeding detection device 7 arranged on one side of the feeding pull belt 9. The control device can control the feeding detection device 7 to detect the battery 200 passing through the detection area of the feeding detection device 7.

[0195] In this embodiment, the feeding detection device 7 is arranged to detect the battery 200 passing through the detection area of the feeding detection device 7, which is beneficial to timely find out whether the battery 200 to be injected is qualified, thereby improving the production efficiency of the battery 200.

[0196] In some embodiments, referring to FIG. 1, the injection system 100 includes the feeding buffer pull belt 12, and the control device can control the robot 8 to transfer the battery 200 that is unqualified after detection to the feeding buffer pull belt 12.

[0197] For example, the battery 200 that is unqualified after detection is a product with poor code scanning or a battery 200 with internal short problem.

[0198] In this embodiment, the feeding buffer pull belt 12 is arranged to buffer the unqualified battery 200, without stopping the line for processing, and without causing the unqualified products to flow to the terminal, which is beneficial to improve the degree of automation and production efficiency.

[0199] In some embodiments, referring to FIG. 1, the injection system 100 includes the feeding matching station 13.

[0200] The qualified battery 200 is transferred to the feeding and discharging station 4 (step S3221), and the unqualified battery 200 is transferred to the feeding buffer pull belt 12 (step S3222), which can include the following steps:

[0201] The control device transfers the battery pack with all qualified batteries to the loading and unloading station 4 (step S3221), and transfers the battery pack with at least one unqualified battery 200 to the loading and pairing station 13 (step S3222a).

[0202] The control device transfers the unqualified battery 200 on the loading and pairing station 13 to the loading buffer pull belt 12 (step S3222b), and if the number of qualified batteries 200 on the loading and pairing station 13 reaches a preset number, the control device transfers the preset number of batteries 200 to the loading and unloading station 4 (step S3222c).

[0203] It can be understood that, since the robot 8 can transfer multiple batteries 200 each time, for example, 4, 5, 6, 7, 8, 9, 10, etc. Thus, multiple batteries can be grouped, which is beneficial for the robot 8 to grasp and transfer.

[0204] In this embodiment, by providing the loading and pairing station 13, when the robot 8 grasps the batteries 200, if the battery pack has unqualified batteries 200, the robot 8 transfers the battery pack with unqualified batteries 200 to the loading and pairing station 13, and then puts the unqualified batteries 200 in the battery pack into the loading buffer pull belt 12. In the case that all the batteries in the battery pack are qualified, the entire battery pack is put into the liquid injection clamp 2. When the number of batteries 200 on the loading and pairing station 13 meets the number of batteries that the robot 8 can grasp at one time, the robot 8 preferentially grasps the batteries 200 on the pairing mechanism and puts them into the liquid injection clamp 2, which is beneficial for emptying the loading and pairing station 13 and improving the efficiency of the robot 8 to fill the liquid injection clamp 2.

[0205] Of course, in other embodiments, when there are unqualified products, the robot 8 puts the unqualified batteries 200 in the battery pack into the loading buffer pull belt 12, and transfers the qualified batteries 200 on the loading and pairing station 13 to the loading and unloading station 4, without waiting until the number of batteries 200 on the loading and pairing station 13 meets the number of batteries that the robot 8 can grasp at one time.

[0206] In some embodiments, referring to FIG. 1, the control device controls the loading detection device 7 to detect the batteries 200 passing through the detection area of the loading detection device 7, including:

[0207] The loading detection device 7 includes a first code scanning device 71. The control device can control the first code scanning device 71 to scan the code of the battery 200 passing through the code scanning area of the first code scanning device 71.

[0208] It should be noted that the specific type of the first code scanning device 71 is not limited herein. For example, a code scanning gun, a camera, etc.

[0209] The first code scanning device 71 is arranged on one side of the feeding pull belt 9, which facilitates the code scanning of the battery 200 passing through the code scanning area of the first code scanning device 71.

[0210] In this embodiment, the first code scanning device 71 is arranged to automatically scan the code of the battery 200, which facilitates the identification and binding of the information of the battery 200, so as to track and record the battery 200 in the whole liquid injection process and improve the reliability of liquid injection.

[0211] In some embodiments, referring to FIG. 1, the feeding detection device 7 includes a second weighing device 72. The control device can control the second weighing device 72 to weigh the battery 200 passing through the weighing area of the second weighing device 72.

[0212] It should be noted that the specific structure of the second weighing device 72 is not limited here, as long as it can automatically weigh the battery 200.

[0213] The second weighing device 72 is arranged on one side of the feeding pull belt 9, which facilitates the weighing of the battery 200 passing through the weighing area of the second weighing device 72 to obtain the weight of the battery 200 before liquid injection.

[0214] In this embodiment, the second weighing device 72 is arranged to automatically weigh the battery 200, so as to obtain the weight of the battery 200 before liquid injection. Then, the first weighing device 61 is used to weigh the battery 200 after liquid injection. The same battery 200 is weighed by the first weighing device 61 and the second weighing device 72. The weight of the battery 200 after liquid injection weighed by the first weighing device 61 is subtracted by the weight of the battery 200 before liquid injection weighed by the second weighing device 72, so as to obtain the liquid injection amount of the battery 200. Thus, it is confirmed whether the liquid injection amount of the battery 200 meets the standard. If the liquid injection amount is insufficient, the unqualified battery 200 is transferred to the liquid supplement buffer station 5. If the liquid injection amount is excessive, the unqualified battery 200 is transferred to the unloading buffer pull belt 14. If the liquid injection amount meets the standard, the qualified battery 200 is transported to the next process, so as to automatically supplement the liquid of the battery 200 and improve the reliability of liquid injection of the battery 200 and the yield of the battery 200. In addition, the automatic liquid supplement of the battery 200 is realized, and the automation degree of the liquid injection of the battery 200 is further improved.

[0215] In the related art, the battery needs to be baked before liquid injection. After the battery is baked, the pole piece is fluffy, and some batteries have internal short circuit. The battery is not tested for short circuit before liquid injection, and the unqualified product flows to the terminal. The battery with internal short circuit cannot be identified after liquid injection. Therefore, the battery with internal short circuit needs to be picked out in advance before liquid injection.

[0216] In some embodiments, referring to FIG. 1, the feeding detection device 7 comprises a short circuit test device 73. The control device can control the short circuit test device 73 to perform a short circuit test (Hi-pot) on the battery 200 passing through the test area of the short circuit test device 73.

[0217] It should be noted that the specific structure of the short circuit test device 73 is not limited here, as long as it can automatically perform a short circuit test on the battery 200.

[0218] The short circuit test device 73 is arranged on one side of the feeding pull belt 9, which is conducive to performing a short circuit test on the battery 200 passing through the test area of the short circuit test device 73.

[0219] In this embodiment, by arranging the short circuit test device 73 for automatically performing a short circuit test on the battery 200, it is beneficial to timely pick out the battery 200 with internal short circuit problems before liquid injection, improve the problem of defective products flowing to the terminal, and improve the yield of the battery 200.

[0220] Exemplarily, the first code scanning device 71, the second weighing device 72, and the short circuit test device 73 are arranged in sequence along the conveying direction of the feeding pull belt 9.

[0221] Of course, the first code scanning device 71 and the second weighing device 72 can also be arranged at the same station, that is, the code scanning of the battery 200 by the first code scanning device 71 and the weighing of the battery 200 by the second weighing device 72 can be performed at the same station.

[0222] The following implementation process of the liquid injection method provided by the embodiment of the present disclosure includes the following steps S801 to S816:

[0223] Step S801: The feeding pull belt conveys the battery to be injected.

[0224] Step S802: The battery to be injected is scanned and weighed, and it is determined whether the battery to be injected is qualified.

[0225] If not, go to step S803; if yes, go to step S804.

[0226] Step S803: The unqualified battery is transferred to the feeding buffer pull belt and processed manually.

[0227] Step S804: The battery to be injected is subjected to a Hi-pot test, and it is determined whether the battery to be injected is qualified.

[0228] If not, go to step S803; if yes, go to step S805.

[0229] Step S805, transfer the battery to the liquid injection clamp of the loading and unloading station.

[0230] Step S806, control the equipment to control the transfer mechanism to transfer the liquid injection clamp of the loading and unloading station to the rotary device.

[0231] Step S807, control the equipment to control the liquid preparation mechanism to prepare liquid for the liquid injection device located in the liquid preparation area.

[0232] Step S808, control the equipment to control the liquid injection device to vacuumize the battery.

[0233] Among them, step S807 and step S808 can be performed simultaneously.

[0234] Step S809, control the equipment to control the liquid injection device to inject liquid into the battery.

[0235] The battery is injected by positive and negative pressure circulation.

[0236] Step S810, control the equipment to control the residual liquid receiving mechanism to inject liquid into the battery.

[0237] Step S811, control the equipment to control the transfer mechanism to transfer the liquid injection clamp on the rotary device to the loading and unloading station.

[0238] Step S812, transfer the battery with injected liquid in the liquid injection clamp to the unloading pull belt.

[0239] Step S813, scan the code and weigh the battery with injected liquid, and determine whether the battery to be injected is qualified.

[0240] If not, go to step S814; if yes, go to step S815.

[0241] Step S814, transfer the unqualified battery to the liquid supplement buffer station for automatic liquid supplement.

[0242] If the battery is unqualified after multiple liquid supplements, transfer the unqualified battery to the unloading buffer pull belt for manual processing.

[0243] Step S815, control the equipment to control the cleaning device to clean the battery.

[0244] Step S816, the unloading pull belt conveys the battery with injected liquid.

[0245] In the description of the disclosure, the description of the terms "in an embodiment", "in some embodiments", "in other embodiments", "in yet other embodiments", or "exemplary" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the disclosure. In the disclosure, the illustrative expressions of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the disclosure and the features of different embodiments or examples can be combined by those skilled in the art without contradiction, as long as they do not contradict each other.

[0246] The above only describes the preferred embodiments of the disclosure and is not intended to limit the disclosure. Those skilled in the art can make various modifications and changes to the disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the disclosure is included in the protection scope of the disclosure.

Claims

1. An injection system for injecting electrolyte into a battery, comprising: a rotating device provided with a plurality of battery placing positions arranged along a circumference and capable of rotating displacement, each of the battery placing positions being used for placing a battery, each of the battery placing positions passing through an in-out position, a standby position, at least one static storage position and returning to the in-out position by rotating displacement; an injection device, each of the battery placing positions being respectively provided with the injection device, the injection device being configured to inject electrolyte into the battery placed in the battery placing position; a standby mechanism arranged on the circumferential outer side of the rotating device, the standby mechanism being configured to supply electrolyte to the injection device provided in the battery placing position at the standby position; an in-out station arranged on the circumferential outer side of the rotating device, the in-out station being configured to place a battery to be injected with electrolyte and a battery after injection; a replenishment storage station configured to store a battery to be replenished with electrolyte; a transfer mechanism configured to move the battery after injection from the battery placing position at the in-out position to the in-out station, and to move the battery to be injected from the in-out station to the battery placing position at the in-out position, or to move the battery to be replenished from the replenishment storage station to the battery placing position at the in-out position; a first weighing device configured to weigh the battery after injection; a second weighing device configured to weigh the battery to be injected; a control device configured to control the second weighing device to weigh the battery to be injected, then control the transfer mechanism to move the battery to be injected at the in-out station to the battery placing position at the in-out position, control the rotating device to rotate and displace the battery placing position, control the standby mechanism to supply electrolyte to the injection device provided in the battery placing position at the standby position, control the injection device after electrolyte supply to inject electrolyte into the battery in the battery placing position before the battery placing position rotates and returns to the in-out position, control the transfer mechanism to move the battery after injection from the battery placing position rotating and returning to the in-out position to the in-out station, then control the first weighing device to weigh the battery after injection, and after the weighing, further control the transfer mechanism to move the battery to be replenished at the replenishment storage station to the battery placing position at the in-out position without placing the battery. 2.The injection system according to claim 1, wherein the injection system comprises an in-feed detection device, the control device controls the in-feed detection device to detect a battery passing through a detection area of the in-feed detection device, the in-feed detection device comprises a second weighing device configured to weigh the battery to be injected passing through a weighing area of the second weighing device. In case that the difference between the weight of the battery after the liquid injection measured by the first weighing device and the weight of the battery before the liquid injection measured by the second weighing device does not reach a specified amount, the control device controls the robot to transfer the battery to the liquid supplement buffer station.

3. The liquid injection system according to claim 2, wherein, The liquid injection system comprises the robot, an upper feeding pull belt with a feeding position, and a lower feeding pull belt with a lower feeding position, the upper feeding detection device is arranged on one side of the upper feeding pull belt, and the control device controls the robot to transfer the qualified battery at the feeding position to the upper and lower feeding station and transfer the battery after the liquid injection at the upper and lower feeding station to the lower feeding position.

4. The liquid injection system according to claim 3, wherein, The upper feeding detection device further comprises a first code scanning device, and the control device controls the first code scanning device to scan the code of the battery passing through the code scanning area of the first code scanning device.

5. The liquid injection system according to claim 3 or 4, wherein, The upper feeding detection device further comprises a short circuit testing device, and the control device controls the short circuit testing device to test the short circuit of the battery passing through the testing area of the short circuit testing device.

6. The liquid injection system according to any one of claims 3-5, wherein, The liquid injection system comprises an upper feeding buffer pull belt, and the control device controls the robot to transfer the unqualified battery detected by the upper feeding detection device to the upper feeding buffer pull belt.

7. The liquid injection system according to claim 6, wherein, The liquid injection system comprises an upper feeding pairing station, the control device controls the robot to transfer the unqualified battery group detected by the upper feeding detection device to the upper feeding pairing station, the unqualified battery group comprises at least one unqualified battery, the control device controls the robot to transfer the unqualified battery at the upper feeding pairing station to the upper feeding buffer pull belt and transfer the qualified battery at the upper feeding pairing station to the upper and lower feeding station.

8. The liquid injection system according to any one of claims 3-7, wherein, The liquid injection system comprises a lower feeding detection device, the lower feeding detection device comprises the first weighing device arranged on one side of the lower feeding pull belt and the second code scanning device arranged on one side of the lower feeding pull belt, and the control device controls the second code scanning device to scan the code of the battery passing through the code scanning area of the second code scanning device.

9. The liquid injection system according to any one of claims 3-8, wherein, The liquid injection system comprises a lower feeding buffer pull belt, and the control device controls the robot to transfer the unqualified battery detected by the lower feeding detection device to the lower feeding buffer pull belt.

10. The liquid injection system according to claim 9, wherein, The liquid injection system comprises a discharging matching station, the control device controls the robot to transfer the battery pack with at least one unqualified battery detected by the discharging detection device to the discharging matching station, the control device controls the robot to transfer the battery to be recharged in the discharging matching station to the recharging buffer station, transfer the unqualified battery except the battery to be recharged to the discharging buffer belt, and transfer the qualified battery in the discharging matching station to the discharging belt.

11. The liquid injection system according to any one of claims 3-10, wherein, The liquid injection system comprises a cleaning device arranged on one side of the discharging belt, and the control device can control the cleaning device to clean the battery passing through the cleaning area of the cleaning device.

12. The liquid injection system according to any one of claims 1-11, wherein, The liquid injection system comprises a liquid injection clamp configured to accommodate the battery to be injected, the battery to be recharged or the battery after injection, and the transfer mechanism is used to move the liquid injection clamp accommodating the battery to be injected or the battery to be recharged from the feeding and discharging station to the battery placement position, or move the liquid injection clamp accommodating the battery after injection from the battery placement position to the feeding and discharging station.

13. The liquid injection system according to any one of claims 1-12, wherein, The liquid injection system comprises at least two rotating devices; and / or, The rotating device comprises at least two static buffer stations, and each static buffer station is arranged at intervals along the circumference of the rotating device.

14. The liquid injection system according to any one of claims 1-13, wherein, The liquid injection system comprises a residual liquid receiving mechanism arranged outside the circumference of the rotating device, Each battery placement position passes through the feeding and discharging station, the recharging station, at least one static buffer station, the residual liquid receiving station and returns to the feeding and discharging station in turn by rotating displacement, The control device controls the residual liquid receiving mechanism to clean the residual electrolyte in the injection cup of the liquid injection device for the battery placement position located at the residual liquid receiving station.

15. The liquid injection system according to any one of claims 1-14, wherein, The liquid injection system comprises at least two rotating devices, and the recharging buffer station is arranged between the at least two rotating devices.

16. The liquid injection system according to any one of claims 3-11, wherein, The liquid injection system comprises at least two rotating devices, the robot is located between the at least two rotating devices and between the recharging buffer station and the discharging belt, the arrangement direction of the feeding belt and the discharging belt is the same as the arrangement direction of the at least two rotating devices, and the feeding belt and the discharging belt are located on the same side of the at least two rotating devices. ​ 17. A liquid injection method applied to a liquid injection system for injecting a battery, the liquid injection system comprising a control device, a rotating device, a liquid injection device, a liquid preparation mechanism, a loading and unloading station, a liquid supplement buffer station, a transfer mechanism, a first weighing device, and a second weighing device, wherein, The rotating device is provided with a plurality of static battery placing positions arranged along a circumference and capable of rotating displacement, the battery placing positions are used for placing batteries, each battery placing position passes through an in-out position, a liquid preparation position, at least one static buffer position and returns to the in-out position by rotating displacement, and the liquid injection method comprises the following steps: The control device controls the second weighing device to weigh the battery to be injected with liquid; The control device controls the transfer mechanism to transfer the battery to be injected with liquid at the feeding and discharging position or the battery to be supplemented with liquid at the liquid supplement buffer position to the battery placing position of the rotating device; The control device controls the rotating device to rotate the battery placing position, and in response to the battery to be injected with liquid or the battery to be supplemented with liquid moving to the liquid preparation position, the control device controls the liquid preparation mechanism to prepare liquid for the liquid injection device arranged at the battery placing position at the liquid preparation position, and controls the liquid injection device to perform vacuum extraction on the battery; In response to completion of the liquid preparation, the control device controls the rotating device to rotate the battery placing position, and controls the liquid injection device to inject liquid into the battery before the battery placing position rotates back to the in-out position; In response to completion of the liquid injection, the control device controls the first weighing device to weigh the battery after the liquid injection which is transferred out of the battery placing position, and transfers the battery to be supplemented with liquid after the weighing to the liquid supplement buffer position.

18. The liquid injection method according to claim 17, wherein The liquid injection system comprises a feeding pull belt, a feeding buffer pull belt and a feeding detection device arranged on one side of the feeding pull belt, and before the control device controls the transfer mechanism to transfer the battery to be injected with liquid at the feeding and discharging position or the battery to be supplemented with liquid at the liquid supplement buffer position to the battery placing position of the rotating device, the method comprises the following steps: The control device controls the feeding pull belt to convey the battery to be injected with liquid; The control device controls the feeding detection device to detect the battery passing through a detection area of the feeding detection device, and transfers the battery passing the detection to the feeding and discharging position, and transfers the battery failing the detection to the feeding buffer pull belt.

19. The liquid injection method according to claim 18, wherein The liquid injection system comprises a feeding pairing position, and the transferring the battery passing the detection to the feeding and discharging position and the transferring the battery failing the detection to the feeding buffer pull belt comprises the following steps: The control device transfers a battery pack passing the detection to the feeding and discharging position and a battery pack failing the detection to the feeding pairing position, and the battery pack failing the detection contains at least one battery failing the detection; The control device transfers the battery failing the detection at the feeding pairing position to the feeding buffer pull belt, and if the battery passing the detection at the feeding pairing position reaches a preset number, the control device transfers the preset number of batteries to the feeding and discharging position.

20. The liquid injection method according to claim 18 or 19, wherein The control device controls the feeding detection device to detect the battery passing through a detection area of the feeding detection device, including: The feeding detection device comprises a second weighing device, and the control device controls the second weighing device to weigh the battery passing through a weighing area of the second weighing device; and / or, The feeding detection device comprises a short-circuit testing device, and the control device controls the short-circuit testing device to perform short-circuit testing on the battery passing through a testing area of the short-circuit testing device; and / or, The feeding detection device comprises a first code scanning device, and the control device controls the first code scanning device to scan the code of the battery passing through a code scanning area of the first code scanning device.

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