Battery transfer method and battery liquid injection system

Abstract

The present application relates to the technical field of battery production, in particular to a battery transfer method and a battery liquid injection system, the battery transfer method comprising: a transfer robot grabbing a battery at an upper loading station and rotating by a first preset angle; the transfer robot placing the battery at a plurality of liquid injection static stations arranged along the same circumference of the transfer robot; the transfer robot grabbing the battery after liquid injection at the liquid injection static station is completed and rotating by a second preset angle; and the transfer robot placing the battery after liquid injection is completed at a lower loading station. The present application can realize the transfer of the battery between the upper loading station and the liquid injection static station and between the liquid injection static station and the lower loading station through the rotation of the transfer robot, complete the loading and unloading of the battery, and does not require other equipment to move back and forth with the transfer robot, thereby simplifying the process, improving the reliability, the loading and unloading efficiency of the battery, and reducing the excessive consumption of the transfer robot and saving energy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery production, in particular to a battery transfer method and a battery liquid injection system. BACKGROUND

[0002] At present, the lithium battery industry is one of the new clean energy for sustainable development today. The lithium battery has the advantages of high energy density, high working voltage, no memory effect, long cycle life, no pollution, light weight and small self-discharge. The lithium battery is widely used in various industries.

[0003] In the production process of lithium batteries, a battery transfer device is used to carry the batteries to realize the automatic flow of the batteries between processes. Specifically, the battery transfer device often uses a feeding robot to grab the batteries and form a group, and then flows through a flow channel to the liquid injection station for liquid injection. After the liquid injection is completed, the battery group is flowed to the fork station through the flow channel, and finally the battery group is forked into the static station by the RGV trolley. After the static station is completed, the battery group is forked into the flow channel by the RGV trolley, and the battery group is brought into different stations through the flow channel.

[0004] However, the above process needs the feeding robot, the flow channel and the RGV trolley to move back and forth multiple times from the feeding to the discharging of the battery, which has the characteristics of complex process, complex structure and poor reliability. SUMMARY

[0005] Therefore, the technical problem to be solved by the present application is to overcome the defects of complex process, complex structure and poor reliability in the prior art, so as to provide a simple and efficient battery transfer method and a battery liquid injection system.

[0006] In order to solve the above problems, the present application provides a battery transfer method, comprising: a transfer robot grabbing a battery of a feeding station and rotating a first preset angle; the transfer robot placing the battery in a plurality of liquid injection and static stations arranged along the same circumference of the transfer robot; the transfer robot grabbing the battery after the liquid injection and static station is completed and rotating a second preset angle; and the transfer robot placing the battery after the liquid injection is completed in a discharging station.

[0007] Optionally, the transfer robot grabs the battery of the feeding station and rotates the first preset angle, specifically including: a plurality of batteries in the feeding station are stacked in groups; and the transfer robot grabs a plurality of groups of batteries at a time and rotates the first preset angle.

[0008] Optionally, the transfer robot places the battery in a plurality of liquid injection and static stations arranged along the same circumference of the transfer robot, specifically including: the transfer robot places a plurality of groups of batteries on the mounting frame of the liquid injection and static station in a plurality of battery liquid injection devices corresponding thereto.

[0009] Optionally, the battery transfer method further comprises: the battery liquid injection device quantitatively injecting liquid into the battery and standing circulation.

[0010] Optionally, the battery transfer method further comprises: a plurality of battery liquid injection devices in each of the liquid injection and standing stations are an injection unit, and the same injection unit is connected to the same liquid supply system.

[0011] Optionally, the battery transfer method further comprises: the transfer robot placing the battery in the lower cavity of the battery liquid injection device; the lower cavity rises and abuts against the upper cavity of the battery liquid injection device to form a first container; and a locking mechanism abuts against the lower cavity to lock the lower cavity and the upper cavity.

[0012] Optionally, a plurality of the liquid injection and standing stations are independently arranged, and the mounting frame can slide out of the liquid injection and standing station along the track.

[0013] Optionally, the feeding station, a plurality of the liquid injection and standing stations, and the discharging station are arranged along the same circumference of the transfer robot.

[0014] Optionally, the battery transfer method further comprises: the transfer robot rotating between the feeding station and a plurality of the liquid injection and standing stations until a plurality of the liquid injection and standing stations are all fed with the battery.

[0015] Optionally, the battery transfer method further comprises: the transfer robot rotating between a plurality of the liquid injection and standing stations and the discharging station until the battery in a plurality of the liquid injection and standing stations after liquid injection is completed is all discharged to the discharging station.

[0016] The application also provides a battery liquid injection system using the above battery transfer method for battery transfer, comprising: a feeding station having a plurality of batteries stacked; a plurality of liquid injection and standing stations; a battery liquid injection device arranged in the liquid injection and standing station; and a transfer robot rotatable, wherein a plurality of the liquid injection and standing stations are arranged along the same circumference of the transfer robot, and the transfer robot can grasp the battery of the feeding station and place it in the battery liquid injection device.

[0017] Optionally, the battery electrolyte filling device includes: a metering device, comprising an excess electrolyte filling system, an electrolyte filling chamber, and a metering cup disposed within the electrolyte filling chamber, wherein the volume chamber of the metering cup is connected to the electrolyte filling chamber, and the excess electrolyte filling system is connected to the electrolyte filling chamber to quantitatively inject electrolyte into the metering cup; an electrolyte filling circulation device, comprising a sealed first container and a plurality of batteries disposed within the first container, wherein the electrolyte filling port of the battery is selectively connected to the electrolyte outlet of the metering cup; and a positive and negative pressure circulation device, adapted to evacuate and circulate positive pressure in the first container.

[0018] The present invention has the following advantages:

[0019] 1. The battery transfer method of the present invention includes: a transfer robot grabbing a battery at the loading station and rotating it at a first preset angle; the transfer robot placing the battery at multiple liquid injection and settling stations arranged along the same circumference of the transfer robot; the transfer robot grabbing a battery after liquid injection at the liquid injection and settling station and rotating it at a second preset angle; and the transfer robot placing the battery after liquid injection at the unloading station, thereby realizing the loading and unloading of the battery liquid injection process.

[0020] Therefore, the advantage of the battery transfer method of the present invention is that the transfer of batteries between the loading station and the liquid injection and settling station, and between the liquid injection and settling station and the unloading station can be realized by controlling the rotation of the transfer robot. The transfer robot only needs to rotate at the station during the entire battery loading and unloading process, without the need for other equipment to move back and forth. This simplifies the process, improves reliability, improves the efficiency of battery loading and unloading, ensures the overall battery production efficiency, and reduces excessive wear and tear on the transfer robot, thus saving energy and being economical.

[0021] 2. The battery transfer method of the present invention, wherein the transfer robot grabs the batteries at the loading station and rotates them by a first preset angle, specifically includes: the loading station stacks multiple batteries in groups, and the transfer robot grabs multiple groups of batteries each time and rotates them by the first preset angle. The grouped batteries facilitate the transfer robot's grabbing of these groups, and the transfer robot can grab multiple groups of batteries each time to achieve transport, thus improving battery transfer and loading efficiency.

[0022] 3. The battery transfer method of the present application, the transfer robot placing the batteries in the multiple liquid injection and standing stations arranged along the same circumference of the transfer robot, specifically comprising: the transfer robot placing multiple groups of batteries in the corresponding multiple battery liquid injection devices of the mounting frame of the liquid injection and standing stations. By placing the multiple groups of batteries once grasped by the transfer robot in the corresponding multiple battery liquid injection devices of the mounting frame of the liquid injection and standing stations, the batteries once grasped are placed in the same liquid injection and standing station at one time, and the transfer robot does not need to rotate multiple times to place the batteries once grasped in different liquid injection and standing stations, thereby improving the battery feeding efficiency, and meanwhile, multiple groups of batteries can be accommodated in each liquid injection and standing station to realize multiple battery liquid injection, improve the liquid injection efficiency, and improve the space utilization rate of the liquid injection and standing stations.

[0023] 4. The battery transfer method of the present application, further comprising: the battery liquid injection device performing quantitative liquid injection and standing circulation on the batteries. By the battery liquid injection device, quantitative liquid injection and standing circulation can be performed on the batteries, that is, the quantitative liquid injection process and the standing circulation process of the batteries can be completed in the liquid injection and standing stations, and the batteries after liquid injection do not need to be transferred to other processes for standing, thereby simplifying the battery production process, saving cost, and being high in efficiency.

[0024] 5. The battery transfer method of the present application, the multiple battery liquid injection devices in each liquid injection and standing station being an injection unit, and the same injection unit being connected to the same liquid supply system, thereby realizing simultaneous liquid injection of the multiple battery liquid injection devices, reducing the pipeline and valve group settings, and saving equipment cost.

[0025] 6. The battery transfer method of the present application, further comprising: the transfer robot placing the batteries in the lower cavity of the battery liquid injection device, the lower cavity rising to abut against the upper cavity of the battery liquid injection device to form a first container, and the locking mechanism abutting against the lower cavity to lock the lower cavity and the upper cavity. Thereby, the first container is sealed to avoid air leakage during the liquid injection process, ensure the positive and negative pressure circulation quality, and ensure the liquid injection quality of the batteries in the first container.

[0026] 7. The battery transfer method of the present application, the multiple liquid injection and standing stations being independently arranged, and the mounting frame being capable of sliding out of the liquid injection and standing station along the track. The multiple liquid injection and standing stations are independent, and when a failure occurs in one of the liquid injection and standing stations, the mounting frame can slide out of the liquid injection and standing station along the track for on-site maintenance, and meanwhile, the normal work of other liquid injection and standing stations is not affected during the maintenance.

[0027] 8. The battery liquid injection system of the present application, which adopts the battery transfer method of the present application to transfer the batteries, thereby simplifying the battery transfer equipment and process, improving the battery feeding and discharging efficiency, ensuring the entire battery production efficiency, reducing the excessive wear of the transfer robot, and saving energy and cost.

[0028] 9. The battery liquid injection system of the present application, the battery liquid injection device comprises: a metering device, a liquid injection circulating device and a positive and negative pressure circulating device, wherein the metering device comprises an excess liquid injection system, a liquid injection cavity and a metering cup arranged in the liquid injection cavity, the volume cavity of the metering cup is communicated with the liquid injection cavity, the excess liquid injection system is communicated with the liquid injection cavity to quantitatively inject electrolyte into the metering cup, the liquid injection circulating device comprises a sealed first container and a plurality of batteries arranged in the first container, the liquid injection port of the battery is selectively communicated with the liquid outlet of the metering cup, and the positive and negative pressure circulating device is suitable for vacuumizing and positive pressure circulating the first container.

[0029] Therefore, the battery liquid injection system of the present application has the following advantages: 1) the metering device is used to replace the liquid injection pump and the liquid injection buffer cup to meter the electrolyte, and the first container is used for battery liquid injection and standing circulation, so that the battery after liquid injection is not needed to be transported to a large pressure container for standing, and the equipment cost is reduced; 2) the first container is only used for containing the battery to realize battery liquid injection and standing circulation, and the volume is small and the processing cost is low; 3) the metering device and the first container are independently arranged, so that the metering cup can complete liquid preparation when the first container places or takes out the battery, the liquid preparation time is saved, and the liquid injection efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0031] Figure 1 A main step flow chart of the battery transfer method of the embodiment one of the present application is shown;

[0032] Figure 2 A detailed step flow chart of the battery transfer method of the embodiment one of the present application is shown;

[0033] Figure 3 A top view structural schematic diagram of the battery liquid injection system of the embodiment one of the present application is shown;

[0034] Figure 4 A structural schematic diagram of the transfer robot in the battery liquid injection system of the embodiment one of the present application is shown;

[0035] Figure 5 A front view structural schematic diagram of the cooperation of the battery liquid injection device and the mounting frame in the battery liquid injection system of the embodiment one of the present application is shown;

[0036] Figure 6 A three-dimensional structural schematic diagram of the cooperation of the battery liquid injection device and the mounting frame in the battery liquid injection system of the embodiment one of the present application is shown;

[0037] Figure 7 Fig. 1 shows a structural schematic diagram of a battery placement in a battery liquid injection device in a battery liquid injection system according to an embodiment of the present application;

[0038] Figure 8 Fig. 2 shows a structural schematic diagram of an abutting cooperation of an upper cavity and a lower cavity in the battery liquid injection device according to the embodiment of the present application;

[0039] Figure 9 Fig. 3 shows a structural schematic diagram of a separation of the upper cavity and the lower cavity in the battery liquid injection device according to the embodiment of the present application;

[0040] Figure 10 Fig. 4 shows a structural schematic diagram of an abutting cooperation of an upper cavity and a lower cavity in a battery liquid injection device according to another embodiment of the present application;

[0041] Figure 11 Fig. 5 shows a structural schematic diagram of a separation of the upper cavity and the lower cavity in the battery liquid injection device according to the another embodiment of the present application;

[0042] Figure 12 Fig. 6 shows a structural schematic diagram of an abutting cooperation of an upper cavity and a lower cavity in a battery liquid injection device according to still another embodiment of the present application;

[0043] Figure 13 Fig. 7 shows a structural schematic diagram of a separation of the upper cavity and the lower cavity in the battery liquid injection device according to the still another embodiment of the present application.

[0044] Legend of reference signs:

[0045] 10, loading station; 20, transfer robot; 201, base; 202, rotating seat; 203, grabbing shaft; 204, clamping jaw; 30, liquid injection and standing station; 301, mounting frame; 302, locking mechanism; 303, track; 40, discharging station; 100, battery liquid injection device; 1, metering device; 11, first liquid supply assembly; 111, first liquid storage tank; 112, first liquid supply pipeline; 12, first linear driving mechanism; 121, first cylinder; 122, first telescopic rod; 123, clamping part; 13, second liquid supply assembly; 131, second liquid storage tank; 132, second liquid supply pipeline; 1321, first liquid supply switch valve; 133, recovery pipeline; 1331, recovery switch valve; 14, first liquid discharge assembly; 141, liquid recovery tank; 142, first liquid discharge pipeline; 1421, first liquid discharge switch valve; 1422, first liquid level sensor; 15, third liquid supply assembly; 151, third liquid storage tank; 152, third liquid supply pipeline; 1521, second liquid supply switch valve; 16, second liquid discharge assembly; 161, second liquid discharge pipeline; 1611, second liquid discharge switch valve; 1612, flow detector; 17, liquid injection cavity; 18, metering cup; 19, volume adjustment piston; 191, liquid injection hole; 110, second liquid level sensor; 120, third liquid level sensor; 2, liquid injection circulating device; 21, first container; 211, upper cavity; 212, lower cavity; 22, battery; 23, second linear driving mechanism; 231, second cylinder; 232, second telescopic rod; 233, connecting part; 24, first liquid injection pipeline; 241, first liquid injection nozzle; 242, first liquid injection switch valve; 25, second container; 251, liquid injection cup; 2511, second liquid injection nozzle; 26, second liquid injection pipeline; 261, second liquid injection switch valve; 262, fourth liquid level sensor; 3, positive and negative pressure circulating device; 31, first pipeline; 311, first switch valve; 32, second pipeline; 321, second switch valve; 33, third pipeline; 331, third switch valve; 34, fourth pipeline; 341, fourth switch valve; 35, positive pressure pipeline; 351, positive pressure switch valve; 36, negative pressure pipeline; 361, negative pressure switch valve; 4, pressure relief pipeline; 41, pressure relief switch valve. DETAILED DESCRIPTION

[0046] The technical solutions of the present application will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0047] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0050] Example 1

[0051] like Figures 1 to 7 As shown, this embodiment discloses a battery transfer method, including the following steps: a transfer robot 20 grabs a battery 22 from a loading station 10 and rotates it by a first preset angle; the transfer robot 20 places the battery 22 in multiple liquid injection and settling stations 30 arranged along the same circumference of the transfer robot 20; the transfer robot 20 grabs the battery 22 after liquid injection in the liquid injection and settling station 30 and rotates it by a second preset angle; the transfer robot 20 places the battery 22 after liquid injection in the unloading station 40.

[0052] Therefore, the advantage of the battery transfer method of the present invention is that by controlling the rotation of the transfer robot 20, the transfer of the battery 22 between the loading station 10 and the liquid injection and settling station 30, and between the liquid injection and settling station 30 and the unloading station 40 can be realized, thereby realizing the loading and unloading of the battery 22. During the entire loading and unloading process of the battery 22, the transfer robot 20 only needs to rotate at the station, without the need for other equipment to move back and forth. This simplifies the process, improves the reliability, improves the loading and unloading efficiency of the battery 22, ensures the overall production efficiency of the battery 22, and reduces excessive wear and tear on the transfer robot 20, making it energy-saving and economical.

[0053] The following is a detailed description of each step of the battery transfer method, with reference to the accompanying drawings.

[0054] The transfer robot 20 grabs the battery 22 at the loading station 10 and rotates it to a first preset angle.

[0055] Specifically, multiple batteries 22 are stacked in groups in the loading station 10, and the transfer robot 20 grabs multiple groups of batteries 22 each time and rotates them at a first preset angle.

[0056] The grouped batteries 22 facilitate the transfer robot 20 to grasp the grouped batteries 22. At the same time, the transfer robot 20 can grasp multiple groups of batteries 22 at a time to realize the transportation, which improves the efficiency of battery 22 transfer and loading.

[0057] like Figure 4 As shown, in this embodiment, the transfer robot 20 includes a base 201, a rotating seat 202, a gripping shaft 203, and grippers 204 mounted on the gripping shaft 203. The base 201 is fixed to the ground, the rotating seat 202 is rotatably mounted on the base 201, the gripping shaft 203 is movably connected to the rotating seat 202 and can move relative to the rotating seat 202, and the grippers 204 are adapted to grip the battery 22. The gripping shaft 203 drives the grippers 204 to move closer to the battery 22. After the grippers 204 grip the battery 22, the rotating seat 202 drives the gripping shaft 203 and the grippers 204 to rotate, thereby realizing the transport of the battery 22. The whole process is flexible, highly automated, and saves manpower and resources.

[0058] Specifically, the transfer robot 20 has two grippers 204, which can simultaneously grab two sets of batteries 22, improving the gripping efficiency of the transfer robot 20 and thus improving the efficiency of the entire battery 22 production line.

[0059] The loading station 10 includes a palletizing robot, a front conveyor belt, and a weighing device. The palletizing robot is used to neatly stack multiple batteries 22 in groups. The front conveyor belt transports the batteries 22, and the weighing device weighs and scans the batteries 22 before they are filled with electrolyte. After being transported, stacked, weighed, and scanned by the above-mentioned mechanisms, the batteries 22 are output in groups. Since the palletizing robot, front conveyor belt, and weighing device are all existing structures in the art, they will not be described in detail here.

[0060] Furthermore, the first preset angle is specifically related to the distance between the feeding station 10 and the liquid injection and settling station 30. The greater the distance, the larger the first preset angle; the smaller the distance, the smaller the first preset angle. That is, the closer the liquid injection and settling station 30 is to the feeding station 10, the smaller the first preset angle that the transfer robot 20 needs to rotate during feeding; the farther the liquid injection and settling station 30 is from the feeding station 10, the larger the first preset angle that the transfer robot 20 needs to rotate during feeding.

[0061] The transfer robot 20 places the battery 22 into multiple liquid injection and settling stations 30 arranged along the same circumference of the transfer robot 20.

[0062] Specifically, the transfer robot 20 places the multiple groups of batteries 22 on the mounting frame 301 of the liquid injection and standing station 30 into the corresponding multiple battery liquid injection devices 100. By placing the multiple groups of batteries 22 grabbed at one time on the mounting frame 301 of the liquid injection and standing station 30 into the corresponding multiple battery liquid injection devices 100 by the transfer robot 20, the batteries 22 grabbed at one time are placed in the same liquid injection and standing station 30 at one time, and the transfer robot 20 does not need to rotate multiple times to place the batteries 22 grabbed at one time in different liquid injection and standing stations 30, which improves the battery 22 feeding efficiency, and each liquid injection and standing station 30 can accommodate multiple groups of batteries 22 to realize multiple battery 22 liquid injection, improve the liquid injection efficiency, and improve the space utilization rate of the liquid injection and standing station 30.

[0063] In the embodiment, the mounting frame 301 is provided with two battery liquid injection devices 100 above and below to accommodate two groups of batteries 22 grabbed at one time by the transfer robot 20.

[0064] The feeding station 10, the multiple liquid injection and standing stations 30, and the discharging station 40 are arranged along the same circumference of the transfer robot 20. By rotating the transfer robot 20 itself along the circumference, the transfer robot 20 can rotate between the feeding station 10 and the multiple liquid injection and standing stations 30, or between the multiple liquid injection and standing stations 30 and the discharging station 40, to realize feeding and discharging of the batteries 22, which is efficient and simple to control.

[0065] The transfer robot 20 rotates between the feeding station 10 and the multiple liquid injection and standing stations 30 in cycles until the multiple liquid injection and standing stations 30 are all fed with the batteries 22.

[0066] By rotating the transfer robot 20 between the feeding station 10 and the multiple liquid injection and standing stations 30 in cycles, the multiple liquid injection and standing stations 30 can be fed with the batteries 22, which is efficient. The number of rotation cycles of the transfer robot 20 during feeding is related to the number of the liquid injection and standing stations 30, which is not limited in the embodiment.

[0067] Further, the transfer robot 20 places the batteries 22 in the lower cavity 212 of the battery liquid injection device 100, the lower cavity 212 rises to abut against the upper cavity 211 of the battery liquid injection device 100 to form the first container 21, and the locking mechanism 302 abuts against the lower cavity 212 to lock the lower cavity 212 and the upper cavity 211. Thus, the first container 21 is sealed to avoid air leakage during the liquid injection process, ensure the positive and negative pressure circulation quality, and ensure the liquid injection quality of the batteries 22 in the first container 21.

[0068] In the embodiment, the plurality of liquid injection and standing stations 30 are independently arranged, and the mounting frame 301 can slide out of the liquid injection and standing station 30 along the track 303. The plurality of liquid injection and standing stations 30 are independent of each other. When a fault occurs in one of the liquid injection and standing stations 30, the mounting frame 301 can be slid out of the liquid injection and standing station 30 along the track 303, facilitating on-site maintenance, and meanwhile, the normal operation of other liquid injection and standing stations 30 is not affected. Specifically, the track 303 extends outward in a direction away from the transfer robot 20 along the liquid injection and standing station 30, and the mounting frame 301 is arranged on the track 303. When the battery liquid injection device 100 on the mounting frame 301 fails, the mounting frame 301 can be pulled or pushed to slide out of the liquid injection and standing station 30 along the track 303 in a direction away from the transfer robot 20, facilitating maintenance and not affecting the normal operation of other liquid injection and standing stations 30.

[0069] The battery transfer method further includes that the battery liquid injection device 100 performs quantitative liquid injection and standing circulation on the battery 22.

[0070] Specifically, the battery liquid injection device 100 can perform quantitative liquid injection and standing circulation on the battery 22, that is, the quantitative liquid injection process and the standing circulation process of the battery 22 can be completed in the liquid injection and standing station 30, without the need to transfer the battery 22 after liquid injection to other processes for standing, thereby simplifying the production process of the battery 22, saving cost, and being high in efficiency.

[0071] In the embodiment, the plurality of battery liquid injection devices 100 in each liquid injection and standing station 30 form a liquid injection unit, and the same liquid injection unit is connected to the same liquid supply system, thereby realizing simultaneous liquid injection of the plurality of battery liquid injection devices 100, reducing the setting of pipelines and valve groups, and saving equipment cost.

[0072] The transfer robot 20 grasps the battery 22 after liquid injection of the liquid injection and standing station 30 is completed and rotates by a second preset angle.

[0073] Specifically, the transfer robot 20 grasps the two groups of batteries 22 after liquid injection of the liquid injection and standing station 30 is completed at one time and drives the batteries 22 to rotate by a second preset angle. The second preset angle is related to the interval distance between the liquid injection and standing station 30 and the unloading station 40. The greater the distance, the greater the second preset angle, and the smaller the distance, the smaller the second preset angle, that is, the closer the liquid injection and standing station 30 to the unloading station 40, the smaller the second preset angle required for the transfer robot 20 to rotate when unloading, and the farther the liquid injection and standing station 30 to the unloading station 40, the greater the second preset angle required for the transfer robot 20 to rotate when unloading.

[0074] The transfer robot 20 places the battery 22 after liquid injection in the unloading station 40.

[0075] Specifically, the transfer robot 20 rotates between the multiple liquid injection and standing stations 30 and the unloading station 40 until the batteries 22 in the multiple liquid injection and standing stations 30 are all unloaded to the unloading station 40. By rotating the transfer robot 20 between the multiple liquid injection and standing stations 30 and the unloading station 40, the batteries 22 in the multiple liquid injection and standing stations 30 can be unloaded, and the unloading efficiency is high. When unloading, the number of rotations of the transfer robot 20 is related to the number of the liquid injection and standing stations 30, which is not limited in the embodiment.

[0076] As shown in Figures 3 to 7 The embodiment also discloses a battery liquid injection system for transferring batteries by using the battery transfer method, which comprises a feeding station 10, multiple liquid injection and standing stations 30, a battery liquid injection device 100 and a transfer robot 20. The feeding station 10 has multiple batteries 22 stacked. The multiple liquid injection and standing stations 30 are arranged along the same circumference of the transfer robot 20. The battery liquid injection device 100 is arranged in the liquid injection and standing station 30. The transfer robot 20 is rotatable. The transfer robot 20 is adapted to grab the batteries 22 in the feeding station 10 and place them in the battery liquid injection device 100.

[0077] The battery liquid injection system can realize reciprocating grabbing of the batteries 22 in the feeding station 10 and placing them in the battery liquid injection device 100 in the multiple liquid injection and standing stations 30 along the same circumference of the transfer robot 20 by rotating the transfer robot 20. During the whole battery 22 feeding process, the transfer robot 20 only needs to rotate in place without reciprocating movement, which improves the battery 22 feeding efficiency, ensures the whole battery 22 production efficiency, reduces the wear of the transfer robot 20 and saves energy and cost.

[0078] The multiple liquid injection and standing stations 30 are arranged adjacent along the circumference of the transfer robot 20. The liquid injection and standing station 30 is provided with a mounting frame 301. The mounting frame 301 is provided with multiple layers of liquid injection stations from top to bottom. Each layer of liquid injection station is provided with a battery liquid injection device 100. Each liquid injection and standing station 30 can realize multiple battery 22 liquid injection, improve the liquid injection efficiency and the space utilization rate of the liquid injection and standing station 30, and has good practicability and economy. In the embodiment, two battery liquid injection devices 100 are arranged above and below each liquid injection and standing station 30, i.e. one battery liquid injection device 100 is arranged above and below the mounting frame 301.

[0079] Optionally, the two battery liquid injection devices 100 in each liquid injection and standing station 30 form a liquid injection unit. The two battery liquid injection devices 100 are connected with the same liquid supply assembly, which can realize simultaneous electrolyte metering, liquid injection and cycle standing of the two battery liquid injection devices 100, and can reduce the number of valves and save cost.

[0080] Specifically, as shown in Figure 1 andFigure 2 As shown, the transfer robot 20 comprises a base 201, a rotating seat 202, a grabbing shaft 203 and a gripper 204 arranged on the grabbing shaft 203, wherein the base 201 is fixed to the ground, the rotating seat 202 is rotatably installed on the base 201, the grabbing shaft 203 is movably connected to the rotating seat 202 and can move relative to the rotating seat 202, and the gripper 204 is adapted to grab the battery 22. The grabbing shaft 203 drives the gripper 204 to move close to the battery 22, and after the gripper 204 grabs the battery 22, the rotating seat 202 drives the grabbing shaft 203 and the gripper 204 thereon to rotate, thereby realizing the carrying of the battery 22. The whole process has good flexibility, high automation degree and saves manpower and material resources.

[0081] In this embodiment, the transfer robot 20 has two grippers 204, which can synchronously grab two groups of batteries 22 to the corresponding two battery liquid injection devices 100, thereby improving the feeding efficiency of the transfer robot 20 and further improving the efficiency of the whole battery 22 production line.

[0082] Optionally, the battery liquid injection system further comprises a discharging station 40 adapted to receive the battery 22 after liquid injection. The feeding station 10, the plurality of liquid injection and standing stations 30 and the discharging station 40 are arranged along the same circumference of the transfer robot 20, so that the transfer robot 20 can realize the picking of the battery 22 from the feeding station 10, the feeding of the battery 22 to the liquid injection and standing station 30, and the discharging of the battery 22 from the liquid injection and standing station 30 to the discharging station 40 by rotating itself. The whole process is simple to control and convenient to operate.

[0083] Specifically, the discharging station 40 comprises a rear weighing and code scanning device, a rear conveying belt and a rear discharging manipulator, wherein the rear weighing and code scanning device weighs and scans the battery 22 after liquid injection, the rear conveying belt is used for conveying the battery 22 after liquid injection, and the rear discharging manipulator is used for grabbing and carrying the battery 22 after liquid injection. The battery 22 after liquid injection is weighed, scanned, conveyed and carried by the above-mentioned structures to realize external output. The whole process has high automation degree and is convenient for system control. Since the above-mentioned weighing and code scanning device, rear conveying belt and rear discharging manipulator are all prior art in the field, they will not be described here.

[0084] The battery liquid injection system further comprises a locking mechanism 302 arranged on the mounting bracket 301, which cooperates with the battery liquid injection device 100 to seal the battery in the battery liquid injection device 100. In this embodiment, one mounting bracket 301 is arranged on each liquid injection and standing station 30, and two locking mechanisms 302 are arranged on each mounting bracket 301 to correspond to the two battery liquid injection devices 100 on the mounting bracket 301 one by one.

[0085] Optionally, the plurality of liquid injection and standing stations 30 are independently arranged, the liquid injection and standing stations 30 are outwardly extended in a direction away from the transfer robot 20 and provided with a track 303, and the mounting frame 301 can slide out of the liquid injection and standing station 30 along the track 303. The plurality of liquid injection and standing stations 30 are independently arranged, when a failure occurs in one of the liquid injection and standing stations 30, the mounting frame 301 can slide out of the liquid injection and standing station 30 along the track, and the on-site maintenance can be performed, and meanwhile, the normal work of other liquid injection and standing stations 30 is not affected during the maintenance.

[0086] In the existing battery liquid injection device, in the liquid injection stage, the secondary cup and the battery are buckled together, the liquid injection pump quantitatively injects electrolyte into the secondary cup, the battery is vacuumized for liquid injection, and the electrolyte in the secondary cup is gradually injected into the battery under the action of vacuum; in this liquid injection stage, the positive and negative pressure systems are used to vacuumize the battery, and when a plurality of batteries need to be injected, a plurality of positive and negative pressure systems need to be configured to vacuumize the plurality of batteries, and the whole structure is complex and the control difficulty is high.

[0087] In the standing stage, the transfer machine is used to transfer the buckled secondary cup and battery together into the closed standing cavity for standing, and the standing cavity needs to be repeatedly subjected to positive and negative pressure circulation during the standing period until the electrolyte is fully injected into the battery; in this standing stage, the use of the transfer machine to transfer the buckled secondary cup and battery increases the equipment cost, and the standing cavity needs to accommodate the whole secondary cup and battery, so the standing cavity has a large volume, high material and production cost, and it takes a long time to vacuumize and positively pressurize the large-capacity standing cavity, and it is difficult to maintain the vacuum degree and negative pressure, and the liquid injection efficiency is low.

[0088] Based on the above problems, the embodiment provides an optimized battery liquid injection device, and specifically, as shown in Figure 8 and Figure 9 The battery liquid injection device 100 includes a metering device 1, a liquid injection circulation device 2, and a positive and negative pressure circulation device 3, wherein the metering device 1 includes an excess liquid injection system, a liquid injection cavity 17, and a metering cup 18 arranged in the liquid injection cavity 17, the volume cavity of the metering cup 18 is communicated with the liquid injection cavity 17, the excess liquid injection system is communicated with the liquid injection cavity 17 to quantitatively inject electrolyte into the metering cup 18, the liquid injection circulation device 2 includes a closed first container 21 and a plurality of batteries 22 arranged in the first container 21, the liquid injection port of the battery 22 is selectively communicated with the liquid outlet of the metering cup 18, and the positive and negative pressure circulation device 3 is suitable for vacuumizing and positively pressurizing the first container 21.

[0089] The battery liquid injection device 100 of the present application uses the positive and negative pressure circulation device 3 to vacuum the first container 21 to a set pressure value, to discharge the air in the plurality of batteries 22, to inject electrolyte into the liquid injection cavity 17 through the excess liquid injection system, to flow the electrolyte into the volume cavity of the measuring cup 18 after the electrolyte submerges the measuring cup 18, to complete the quantitative liquid injection of the electrolyte, and to flow the electrolyte in the measuring cup 18 into the battery 22 through the liquid outlet and the liquid injection port under the action of negative pressure during liquid injection, to open the positive and negative pressure circulation device 3 to vacuum the first container 21 and to circulate the positive pressure, to make the electrolyte fully injected into the battery 22 and to complete the standing.

[0090] Therefore, the battery liquid injection device 100 of the present application has the following advantages: the measuring device 1 is used to replace the liquid injection pump and the liquid injection buffer cup to measure the electrolyte, to reduce the equipment cost; the first container 21 is only used to hold the batteries 22, to realize the liquid injection and the circulation standing of the batteries 22, to have a small volume, and to have a low processing cost; the measuring device 1 and the first container 21 are independently arranged, so that the measuring cup 18 can complete the liquid preparation when the batteries 22 are placed or taken out from the first container 21, to save the liquid preparation time, to have high liquid injection efficiency; the positive and negative pressure circulation device 3 can vacuum and circulate the positive pressure of the first container 21, to realize the vacuum and the positive pressure circulation of the plurality of batteries 22, to not need to respectively arrange a positive and negative pressure circulation system for each battery 22, to simplify the structure of the whole liquid injection system, and to simultaneously control the plurality of batteries 22 by the positive and negative pressure circulation device 3, to improve the control efficiency and the consistency.

[0091] In the embodiment, the excess liquid injection system includes the second liquid supply assembly 13 and the first liquid discharge assembly 14, wherein the second liquid supply assembly 13 is communicated with the liquid injection cavity 17 to inject electrolyte into the liquid injection cavity 17, and the first liquid discharge assembly 14 is communicated with the liquid injection cavity 17 to discharge the liquid in the liquid injection cavity 17. The second liquid supply assembly 13 injects electrolyte into the first container 21, the electrolyte flows into the volume cavity of the measuring cup 18 after the electrolyte submerges the measuring cup 18, and when the electrolyte in the measuring cup 18 reaches the set volume, the excess electrolyte in the first container 21 is discharged through the first liquid discharge assembly 14, to complete the quantitative liquid injection of the measuring cup 18.

[0092] As the preferred technical scheme of the battery liquid injection device of the embodiment, the second liquid supply assembly 13 includes the second liquid storage tank 131, the second liquid supply pipeline 132, and the liquid inlet arranged at the top of the liquid injection cavity 17, the second liquid storage tank 131 is connected with the second liquid supply pipeline 132, the second liquid supply pipeline 132 is connected with the liquid inlet, and the first liquid supply switch valve 1321 is arranged on the second liquid supply pipeline 132. When liquid injection is needed, the first liquid supply switch valve 1321 is opened, the electrolyte flows from the second liquid storage tank 131 into the second liquid supply pipeline 132, flows into the liquid injection cavity 17 through the second liquid supply pipeline 132 and the liquid inlet, and then flows into the measuring cup 18, to realize the quantitative liquid injection of the electrolyte.

[0093] Specifically, the second storage tank 131 stores electrolyte, the second liquid supply pipeline 132 facilitates long-distance transmission of the electrolyte, and the first liquid supply switch valve 1321 can cut off or connect the second liquid supply pipeline 132. It can be understood that the first liquid supply switch valve 1321 is in a closed state when liquid supply is not needed.

[0094] Further, the first liquid discharge assembly 14 includes a liquid return tank 141, a first liquid discharge pipeline 142, and a liquid discharge port arranged at the bottom of the liquid injection cavity 17. The liquid return tank 141 is connected with the first liquid discharge pipeline 142, the first liquid discharge pipeline 142 is connected with the liquid discharge port, and the first liquid discharge pipeline 142 is provided with a first liquid discharge switch valve 1421. When liquid discharge is needed, the first liquid discharge switch valve 1421 is opened, the electrolyte flows from the liquid discharge port at the bottom of the liquid injection cavity 17 into the first liquid discharge pipeline 142, and then flows into the liquid return tank 141 through the first liquid discharge pipeline 142, thereby achieving both quantitative liquid injection of the measuring cup 18 and recycling of the electrolyte, and having good practicability.

[0095] Specifically, the liquid return tank 141 is used to store the electrolyte discharged from the liquid injection cavity 17, the first liquid discharge pipeline 142 facilitates long-distance discharge of the electrolyte, and the first liquid discharge switch valve 1421 can cut off or connect the first liquid discharge pipeline 142.

[0096] It can be understood that the first liquid discharge switch valve 1421 is in a closed state when liquid discharge is not needed, so as to avoid leakage of the electrolyte in the liquid injection cavity 17 and affect liquid injection.

[0097] Since the size of the first liquid discharge pipeline 142 is relatively long in actual use, the first liquid discharge switch valve 1421 in the embodiment is provided with two, one of which is arranged close to the liquid return tank 141, and the other of which is arranged close to the liquid injection cavity 17, so as to avoid backflow of the electrolyte in the liquid return tank 141 and the liquid injection cavity 17 into the first liquid discharge pipeline 142 in a non-liquid discharge state.

[0098] Further, the first liquid discharge pipeline 142 is further provided with a first liquid level sensor 1422 arranged between the two first liquid discharge switch valves 1421, so as to monitor the flow condition of the electrolyte in the first liquid discharge pipeline 142. If the first liquid level sensor 1422 does not detect a liquid level during the liquid discharge process, it indicates that the liquid discharge is completed, and at this time, the two first liquid discharge switch valves 1421 can be closed.

[0099] In addition, the embodiment further includes a recovery pipeline 133 connected with the second storage tank 131 and the liquid return tank 141, so as to facilitate flow of the electrolyte in the liquid return tank 141 into the second storage tank 131 to realize recycling and save cost. Correspondingly, the recovery pipeline 133 is provided with a recovery switch valve 1331 to cut off or connect the recovery pipeline 133, thereby facilitating recycling of the electrolyte.

[0100] The injection chamber 17 serves as both a transition chamber for electrolyte injection and a mounting chamber for the measuring cup 18.

[0101] In this embodiment, multiple measuring cups 18 are arranged in a row in the injection chamber 17. By injecting liquid into the injection chamber 17, multiple measuring cups 18 can be injected quantitatively at the same time, resulting in high measurement efficiency.

[0102] As a preferred technical solution of the battery electrolyte filling device in this embodiment, the metering device 1 further includes a volume adjusting piston 19, which is inserted into the metering cup 18 and has an injection hole 191. When the electrolyte enters the filling chamber 17, it flows into the metering cup 18 through the injection hole 191 on the volume adjusting piston 19. At the same time, the volume of the metering cup 18 can be adjusted by the volume adjusting piston 19 to meet different quantitative filling requirements, making it widely applicable.

[0103] Specifically, the adjustment method of the volume adjustment piston 19 is as follows: when it is necessary to reduce the volume of the measuring cup 18, the volume adjustment piston 19 is pushed into the volume cavity of the measuring cup 18, increasing the depth of the volume adjustment piston 19 into the measuring cup 18, thereby reducing the effective volume cavity of the measuring cup 18 for holding electrolyte; when it is necessary to increase the volume of the measuring cup 18, the volume adjustment piston 19 is pulled out of the volume cavity of the measuring cup 18 in the opposite direction, reducing the depth of the volume adjustment piston 19 into the measuring cup 18, thereby increasing the effective volume cavity of the measuring cup 18 for holding electrolyte, thereby achieving the adjustment of the effective volume of the measuring cup 18, meeting diverse electrolyte filling needs, and improving the applicability of the battery electrolyte filling device.

[0104] The first container 21 is a closed container located directly below the injection chamber 17. The first container 21 contains multiple batteries 22 arranged in a row and connected one-to-one with multiple measuring cups 18 to achieve one-to-one injection of electrolyte and improve injection efficiency.

[0105] As a preferred embodiment of the battery filling device, the first container 21 includes an upper cavity 211 and a lower cavity 212. Multiple batteries 22 are disposed within the lower cavity 212, and the lower cavity 212 can cooperate with the upper cavity 211 to form a sealed first container 21. Setting the first container 21 in a form where the lower cavity 212 and the upper cavity 211 cooperate facilitates the placement and removal of multiple batteries 22. When a battery 22 is placed into the lower cavity 212, the lower cavity 212 rises and abuts against the upper cavity 211 to form a sealed first container 21. When the battery 22 has been filled with electrolyte and needs to be removed, the lower cavity 212 descends and separates from the upper cavity 211, allowing the battery 22 to be removed from the lower cavity 212.

[0106] And, the locking mechanism 302 can abut against the lower cavity 211 to lock the lower cavity 211 and the upper cavity 212, further realizing the sealing of the first container 21, avoiding the leakage of the first container 21 during the vacuumizing and positive pressure circulation, and ensuring the quality of the liquid injection of the battery 22 in the first container 21.

[0107] Further, the liquid injection circulation device 2 further comprises a second linear driving mechanism 23, which is in driving connection with the lower cavity 212 to drive the lower cavity 212 to ascend and descend, so that the lower cavity 212 can cooperate with the upper cavity 211 to form the first container 21.

[0108] Specifically, the second linear driving mechanism 23 comprises a second cylinder 231, a second telescopic rod 232 and a second connecting part 233, wherein the second cylinder 231 is in driving connection with the second telescopic rod 232, the second telescopic rod 232 is connected with the second connecting part 233, and the second connecting part 233 is connected with the bottom of the lower cavity 212. When the battery 22 is put into the lower cavity 212, the second cylinder 231 drives the second telescopic rod 232 to extend, drives the second connecting part 233 at one end of the second telescopic rod 232 and the lower cavity 212 to ascend, and makes the lower cavity 212 abut against the upper cavity 211 to form the first container 21. When the battery 22 needs to be taken out after the liquid injection is completed, the second cylinder 231 drives the second telescopic rod 232 to retract, drives the second connecting part 233 at one end of the second telescopic rod 232 and the lower cavity 212 to descend, and separates the lower cavity 212 from the upper cavity 211, so that the battery 22 in the lower cavity 212 can be taken out.

[0109] As for the specific installation, the liquid injection cavity 17, the upper cavity 211 and the second cylinder 231 are fixedly connected on the mounting frame 301, and the lower cavity 212 can be driven by the second cylinder 231 to move away from or close to the upper cavity 211.

[0110] The battery liquid injection device 100 further comprises a first liquid injection pipeline 24, a first liquid injection nozzle 241 is connected on the first liquid injection pipeline 24, the first liquid injection nozzle 241 is at least partially inserted into the upper cavity 211 and can communicate with the liquid injection port of the battery 22, the first liquid injection pipeline 24 is connected with the liquid outlet of the measuring cup 18, and a first liquid injection switch valve 242 is further arranged on the first liquid injection pipeline 24. During the liquid injection, the first liquid injection switch valve 242 is opened, the electrolyte flows from the liquid outlet of the measuring cup 18 into the first liquid injection pipeline 24, flows through the first liquid injection pipeline 24 and the first liquid injection nozzle 241, and finally flows into the battery 22 through the liquid injection port, so as to realize the liquid injection of the battery 22.

[0111] It can be understood that the first liquid injection switch valve 242 is in the closed state during the quantitative liquid injection of the measuring cup 18, and the first liquid injection switch valve 242 is opened when it is needed to start the liquid injection of the battery 22.

[0112] And the first liquid injection pipeline 24 is connected with the first liquid discharge pipeline 142, so that after the battery 22 is completed with the liquid injection, the residual electrolyte in the first liquid injection pipeline 24 is returned to the liquid return tank 141 through the first liquid discharge pipeline 142, realizing the recycling of the electrolyte and improving the economy.

[0113] As for the number of settings, the first liquid injection pipeline 24 is also provided with multiple, and multiple metering cups 18 and multiple batteries 22 are connected one by one through multiple first liquid injection pipelines 24, that is, each first liquid injection pipeline 24 is connected with one metering cup 18 and one battery 22, realizing one-to-one liquid injection, which is convenient for independent control.

[0114] As for the overall setting position, in the embodiment, the liquid injection cavity 17, the upper cavity 211 and the lower cavity 212 are arranged in sequence from top to bottom and are located on the same center line, and the first liquid injection pipeline 24 is arranged between the liquid injection cavity 17 and the upper cavity 211 to connect the metering cup 18 in the liquid injection cavity 17 and the battery 22 in the first container 21.

[0115] The positive and negative pressure circulation device 3 is connected with the liquid injection cavity 17 and the first container 21 to simultaneously extract vacuum and positive pressure circulation for the liquid injection cavity 17 and the first container 21, which is convenient for liquid injection of the liquid injection cavity 17 and improves the vacuum extraction and positive pressure extraction efficiency of the battery 22.

[0116] Specifically, the positive and negative pressure circulation device 3 includes a suction pump, a first pipeline 31 and a second pipeline 32 connected with the suction pump, the first pipeline 31 is communicated with the liquid injection cavity 17, and the second pipeline 32 is communicated with the upper cavity 211 and the first pipeline 31. Starting the suction pump can suck out the air in the liquid injection cavity 17 and the first container 21 through the first pipeline 31 and the second pipeline 32, so that the liquid injection cavity 17 and the first container 21 form a negative pressure, which is beneficial to the air exhaust of the battery 22, and the negative pressure is also convenient for liquid injection of the liquid injection cavity 17 and the battery 22, improving the liquid injection efficiency.

[0117] Compared with the prior art of vacuum extraction for each battery 22, the scheme of the embodiment can realize vacuum extraction for all batteries 22 in the first container 21 by connecting the positive and negative pressure circulation device 3 with the liquid injection cavity 17 and the first container 21, which simplifies the system structure and is convenient for overall operation control. It should be noted that since the liquid injection cavity 17 and the first container 21 are communicated through the first liquid injection pipeline 24, part of the air in the first container 21 is discharged through the second pipeline 32, and part of the air in the first container 21 flows into the liquid injection cavity 17 through the first liquid injection pipeline 24 and is discharged through the first pipeline 31, which speeds up the air exhaust of the battery 22.

[0118] Further, the first pipeline 31 is provided with a first switch valve 311, which is arranged upstream of the connection between the first pipeline 31 and the second pipeline 32 to control the opening and closing of the first pipeline 31 and the second pipeline 32. The second pipeline 32 is provided with a second switch valve 321 to control the opening and closing of the second pipeline 32. The first switch valve 311 and the second switch valve 321 are opened during vacuum extraction or positive pressure extraction, and are closed during the liquid injection of the metering device 1.

[0119] The battery liquid injection device 100 further comprises a pressure relief pipeline 4, which is in communication with the first container 21. The pressure relief pipeline 4 can relieve the pressure of the first container 21 after the liquid injection is completed, so that the first container 21 returns to the ambient pressure, facilitating the separation of the upper cavity 211 and the lower cavity 212, and facilitating the removal of the battery 22 in the first container 21. In the embodiment, the pressure relief pipeline 4 is in communication with the upper cavity 211.

[0120] Further, the pressure relief pipeline 4 is provided with a pressure relief switch valve 41 to cut off and communicate the pressure relief pipeline 4. Specifically, the pressure relief switch valve 41 is opened when the first container 21 needs to be relieved, so that the first container 21 returns to the normal pressure, facilitating the removal of the battery 22; and the pressure relief switch valve 41 is closed during the liquid injection of the metering cup 18.

[0121] It can be understood that, since the first container 21 of the embodiment has a small volume, in order to realize the continuous vacuum extraction (to realize the continuous exhaust of the battery 22 for a period of time) or the positive pressure extraction cycle (to make the battery 22 stand for a period of time) of the first container 21, the pressure relief switch valve 41 of the embodiment is also opened during the vacuum extraction and the positive pressure extraction cycle of the first container 21. Of course, the amount of gas extracted by the positive and negative pressure cycle device 3 is greater than the amount of gas entering the first container 21 from the pressure relief pipeline 4. At the same time, the pressure relief pipeline 4 can also be used to detect the vacuum degree when the first container 21 is being extracted.

[0122] In order to facilitate the understanding of the battery liquid injection device 100 of the embodiment, the liquid injection process thereof will be introduced as follows in combination with the drawings of the specification:

[0123] Placing the battery 22: placing the battery 22 in the lower cavity 212, starting the second air cylinder 231, the second air cylinder 231 driving the second telescopic rod 232 to extend, driving the lower cavity 212 to rise to abut with the upper cavity 211, the locking mechanism 302 further abutting the lower cavity 212 to lock the two, forming a sealed first container 21, at this time the liquid injection port of the battery 22 is in communication with the first liquid injection nozzle 241;

[0124] Vacuumizing: open the first liquid injection switch valve 242, the first switch valve 311 and the second switch valve 321, start the suction pump to vacuumize, the air in the liquid injection cavity 17 and the first container 21 is discharged through the first pipeline 31 and the second pipeline 32, to discharge the gas in the battery 22, until the pressure in the liquid injection cavity 17 and the first container 21 reaches the preset value, close the first switch valve 311 and the second switch valve 321;

[0125] Electrolyte metering: close the first liquid injection switch valve 242, open the first liquid supply switch valve 1321, the electrolyte in the second liquid storage tank 131 flows into the second liquid supply pipeline 132 under the action of pressure, flows into the liquid injection cavity 17 through the liquid inlet, the electrolyte in the liquid injection cavity 17 flows into the measuring cup 18 through the liquid injection hole 191 on the volume adjusting piston 19, when the electrolyte in the liquid injection cavity 17 covers the measuring cup 18, that is, the measuring cup 18 is filled with electrolyte, close the first liquid supply switch valve 1321 and open the first liquid discharge switch valve 1421, the excess electrolyte in the liquid injection cavity 17 is discharged into the liquid return tank 141 through the first liquid discharge pipeline 142, the liquid discharge completion is observed through the first liquid level sensor 1422, after the liquid discharge is completed, close the first liquid discharge switch valve 1421;

[0126] Electrolyte injection: open the first liquid injection switch valve 242, the electrolyte flows into the first liquid injection pipeline 24 from the liquid outlet at the bottom of the measuring cup 18, flows through the first liquid injection switch valve 242 and the first liquid injection nozzle 241, flows into the battery 22 through the liquid injection port, to realize the electrolyte injection of the battery 22;

[0127] Positive and negative pressure circulation: open the first switch valve 311 and the second switch valve 321, start the suction pump to pressurize and vacuumize the liquid injection cavity 17 and the first container 21 in circulation, to completely inject the electrolyte into the battery 22.

[0128] The embodiment also discloses a battery production line, which comprises the battery liquid injection system of the embodiment, improves the battery 22 feeding efficiency, ensures the whole battery 22 production efficiency, reduces the loss of the transfer robot 20 and saves energy and economy.

[0129] It should be noted that in other embodiments, the liquid injection hole 191 can not be formed in the volume adjusting piston 19, but the volume adjusting piston 19 is matched with the inner wall gap of the measuring cup 18, and the electrolyte in the liquid injection cavity 17 flows into the measuring cup 18 through the gap; meanwhile, in other embodiments, the second linear driving mechanism 23 can also be in the driving form of the motor and the screw rod cooperation, and the lifting of the lower cavity 212 can also be realized, which is not limited to the scheme of the embodiment.

[0130] Embodiment two

[0131] Compared with the embodiment one, the difference of the embodiment is that: Figure 10 and Figure 11As shown, the embodiment does not provide the volume adjustment piston 19 and the overfilling system is provided in a different manner. Specifically, the overfilling system of the embodiment includes a third liquid supply assembly 15 and a second liquid discharge assembly 16. The third liquid supply assembly 15 is in communication with the liquid injection cavity 17 to inject electrolyte into the liquid injection cavity 17. The second liquid discharge assembly 16 partially extends into the measuring cup 18 and the length of the second liquid discharge assembly 16 extending into the measuring cup 18 is adjustable to discharge electrolyte in the measuring cup 18.

[0132] With the above arrangement, the third liquid supply assembly 15 injects electrolyte into the liquid injection cavity 17. The electrolyte flows into the measuring cup 18 when the electrolyte level in the measuring cup 18 is higher than the measuring cup 18. After the injection of electrolyte is stopped, the second liquid discharge assembly 16 discharges electrolyte in the measuring cup 18 to keep the liquid level in the measuring cup 18 at a certain position, thereby completing the quantitative injection of electrolyte. The length of the second liquid discharge assembly 16 extending into the measuring cup 18 can be adjusted to adjust the discharge amount of electrolyte in the measuring cup 18, thereby adjusting the volume of the measuring cup 18 to meet different quantitative injection requirements, thereby improving the applicability.

[0133] The third liquid supply assembly 15 includes a third liquid storage tank 151 and a third liquid supply pipeline 152. The third liquid storage tank 151 and the third liquid supply pipeline 152 are connected. The third liquid supply pipeline 152 is connected with the liquid injection cavity 17. Electrolyte can flow out of the third liquid storage tank 151, flow into the liquid injection cavity 17 through the third liquid supply pipeline 152, and realize injection.

[0134] Further, the third liquid supply pipeline 152 is provided with a second liquid supply switch valve 1521 to control the opening and closing of the third liquid supply pipeline 152. The second liquid supply switch valve 1521 is opened when the measuring cup 18 is quantitatively injected, and the second liquid supply switch valve 1521 is closed when vacuumizing, positive pressure circulation, and injecting electrolyte into the battery 22.

[0135] The second liquid discharge assembly 16 includes a second liquid discharge pipeline 161. The second liquid discharge pipeline 161 is provided with a second liquid discharge switch valve 1611 and a flow detector 1612. The second liquid discharge pipeline 161 partially extends into the measuring cup 18. The second liquid discharge switch valve 1611 can control the opening and closing of the second liquid discharge pipeline 161. The second liquid discharge switch valve 1611 is only opened when electrolyte needs to be discharged. The flow detector 1612 can detect the electrolyte discharge condition to improve the accuracy of quantitative injection.

[0136] In addition, the measuring device 1 of the embodiment further includes a second liquid level sensor 110 extending into the measuring cup 18 to detect the real-time liquid level of the measuring cup 18 to further improve the accuracy and reliability of quantitative injection.

[0137] The positive and negative pressure circulation device 3 of the embodiment further comprises a positive pressure pipeline 35 and a negative pressure pipeline 36. The positive pressure pipeline 35 is connected with the first pipeline 31 and the second pipeline 32. The positive pressure pipeline 35 is provided with a positive pressure switch valve 351. The negative pressure pipeline 36 is connected with the first pipeline 31 and the second pipeline 32. The negative pressure pipeline 36 is provided with a negative pressure switch valve 361. The positive pressure pipeline 35 and the negative pressure pipeline 36 can be used to realize the simultaneous input of positive pressure or negative pressure into the first pipeline 31 and the second pipeline 32, respectively. Compared with the mode of switching positive pressure and negative pressure by using the same pipeline, the embodiment does not need to switch positive pressure and negative pressure, and the control efficiency and response speed of the positive and negative pressure circulation device 3 are further improved.

[0138] Embodiment three

[0139] Compared with the embodiment one, the difference of the embodiment lies in that, as shown in Figure 12 and Figure 13 , the specific setting of the excessive liquid injection system is different. Specifically, the excessive liquid injection system of the embodiment comprises a first liquid supply assembly 11 and a first linear driving mechanism 12. The first liquid supply assembly 11 is in communication with the liquid injection cavity 17 to inject electrolyte into the liquid injection cavity 17. The first linear driving mechanism 12 is in transmission connection with the measuring cup 18 to drive the measuring cup 18 to ascend and descend, so that the liquid inlet of the measuring cup 18 can ascend above the liquid level in the liquid injection cavity 17. The electrolyte is injected into the liquid injection cavity 17 through the first liquid supply assembly 11, and the electrolyte flows into the volume cavity of the measuring cup 18 when the electrolyte is above the measuring cup 18. When the electrolyte completely covers the measuring cup 18, i.e., the measuring cup 18 is full, the first linear driving mechanism 12 drives the measuring cup 18 to ascend, so that the liquid inlet of the measuring cup 18 ascends above the liquid level, and the quantitative liquid injection of the measuring cup 18 is completed.

[0140] Specifically, the first liquid supply assembly 11 comprises a first liquid storage tank 111 and a first liquid supply pipeline 112. The first liquid storage tank 111 is connected with the first liquid supply pipeline 112. The first liquid supply pipeline 112 is connected with the liquid inlet at the top of the liquid injection cavity 17. When liquid injection is needed, the electrolyte flows from the first liquid storage tank 111 into the first liquid supply pipeline 112, flows into the liquid injection cavity 17 through the first liquid supply pipeline 112 and the liquid inlet, and then flows into the measuring cup 18.

[0141] The first linear driving mechanism 12 comprises a first cylinder 121, a first telescopic rod 122 and a clamping part 123. The first cylinder 121 is in driving connection with the first telescopic rod 122, and the first telescopic rod 122 is connected with the clamping part 123. The clamping part 123 is connected with the measuring cup 18. The first cylinder 121 drives the first telescopic rod 122 to extend or retract, drives the clamping part 123 and the measuring cup 18 connected with the clamping part 123 to move along the extending or retracting direction of the first telescopic rod 122, thereby drives the measuring cup 18 to rise so that the liquid inlet of the measuring cup 18 is higher than the liquid level in the liquid injection cavity 17 to realize the electrolyte quantitative injection, or drives the measuring cup 18 to descend to reset the measuring cup 18 to realize the liquid preparation. Specifically, the first cylinder 121 is fixed on the mounting frame 301, the first telescopic rod 122 extends into the liquid injection cavity 17 and is connected with the measuring cup 18 through the clamping part 123 at one end of the first telescopic rod 122, thereby drives the measuring cup 18 to rise or descend.

[0142] In addition, the measuring device 1 of the embodiment further comprises a third liquid level sensor 120 connected with the liquid injection cavity 17, which is used to measure the liquid level in the liquid injection cavity 17 to ensure that the liquid level in the liquid injection cavity 17 is higher than the measuring cup 18 to meet the liquid injection requirement.

[0143] Optionally, the liquid injection circulating device 2 of the embodiment further comprises a sealed second container 25 connected between the liquid injection cavity 17 and the first container 21. The second container 25 is provided with a plurality of liquid injection cups 251. The liquid injection cup 251 is in communication with the liquid outlet of the measuring cup 18, and the liquid outlet of the liquid injection cup 251 is selectively in communication with the liquid injection port of the battery 22.

[0144] The top of the liquid injection cup 251 is open, and the bottom of the liquid injection cup 251 is provided with a second liquid injection nozzle 2511 extending into the upper cavity 211 to be in communication with the liquid injection port of the battery 22.

[0145] It should be noted that the liquid injection circulating device 2 of the embodiment does not provide the first liquid injection pipeline 24 and its related structure, and the liquid injection circulating device 2 of the embodiment further comprises a second liquid injection pipeline 26, the second liquid injection pipeline 26 is at least partially inserted into the second container 25 and communicates with the liquid injection cup 251, the second liquid injection pipeline 26 further communicates with the liquid outlet of the metering cup 18, and the second liquid injection pipeline 26 is provided with a second liquid injection switch valve 261 and a fourth liquid level sensor 262. The second liquid injection pipeline 26 is provided with a plurality of second liquid injection pipelines 26, and the plurality of second liquid injection pipelines 26 are connected in one-to-one correspondence with the plurality of liquid injection cups 251 and the plurality of metering cups 18. The second liquid injection switch valve 261 is used to control the on-off of the second liquid injection pipeline 26, and is opened when the battery 22 is injected with liquid electrolyte and the positive and negative pressure circulating device 3 is started, and is closed when the metering cup 18 is injected with liquid electrolyte. The fourth liquid level sensor 262 is used to detect the flow condition of the liquid electrolyte in the second liquid injection pipeline 26, so as to facilitate the judgment of the liquid electrolyte injection condition.

[0146] Moreover, the positive and negative pressure circulating device 3 of the embodiment is connected with the upper cavity 211 in the first container 21 and the second container 25, so as to simultaneously perform vacuumizing and positive pressure circulation on the first container 21 and the second container 25, which facilitates the rapid exhaust of the battery 22, and the negative pressure also facilitates the flow of the liquid electrolyte in the metering cup 18 to the liquid injection cup 251 in the second container 25 and the battery 22, thereby improving the liquid injection efficiency.

[0147] In the embodiment, the positive and negative pressure circulating device 3 also has a difference in the setting, specifically, the positive and negative pressure circulating device 3 comprises a third pipeline 33 communicating with the second container 25 and a fourth pipeline 34 communicating with the upper cavity 211, the third pipeline 33 is connected with the fourth pipeline 34, and the third pipeline 33 is provided with a third switch valve 331 to control the on-off of the third pipeline 33, and the fourth pipeline 34 is provided with a fourth switch valve 341 to control the on-off of the fourth pipeline 34.

[0148] It should be noted here that since the first container 21 and the second container 25 are communicated through the second liquid injection nozzle 2511, when vacuumizing or performing positive pressure circulation, part of the air in the first container 21 is discharged through the fourth pipeline 34, and part of the air is flowed into the second container 25 through the second liquid injection nozzle 2511 and is discharged through the third pipeline 33, thereby accelerating the exhaust of the battery 22 and the positive pressure circulation.

[0149] Obviously, the above embodiment is only an example for clearly illustrating, but not a limitation on the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments cannot be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A battery transfer method, characterized in that, include: The transfer robot (20) grabs the battery (22) from the loading station (10) and rotates it at a first preset angle; The transfer robot (20) places the battery (22) in multiple liquid injection and static placement stations (30) arranged in the same circumference along the transfer robot (20). The battery liquid injection device (100) performs quantitative liquid injection and static circulation on the battery (22); The transfer robot (20) grabs the battery (22) after the liquid injection is completed at the liquid injection station (30) and rotates it by a second preset angle; The transfer robot (20) places the battery (22) after liquid injection at the unloading station (40). The quantitative injection solution includes: Electrolyte is injected into the injection chamber (17) through the second liquid supply assembly (13); The electrolyte overflows the multiple measuring cups (18) located in the injection chamber (17) and flows into the volume chamber of each measuring cup (18); The first drain assembly (14) drains excess electrolyte from the injection chamber (17).

2. The battery transfer method according to claim 1, characterized in that, The aforementioned transfer robot (20) grabs the battery (22) from the loading station (10) and rotates it by a first preset angle, specifically including: The multiple batteries (22) in the loading station (10) are stacked in groups; The transfer robot (20) grabs multiple sets of batteries (22) each time and rotates them at the first preset angle.

3. The battery transfer method according to claim 2, characterized in that, The aforementioned transfer robot (20) places the battery (22) into multiple liquid injection and settling stations (30) arranged along the same circumference of the transfer robot (20), specifically including: The transfer robot (20) places multiple sets of batteries (22) into multiple battery injection devices (100) on the mounting frame (301) of the injection and settling station (30).

4. The battery transfer method according to claim 3, characterized in that, Also includes: The multiple battery injection devices (100) within each of the injection station (30) constitute an injection unit, and the same injection unit is connected to the same liquid supply system.

5. The battery transfer method according to claim 3, characterized in that, Also includes: The transfer robot (20) places the battery (22) into the lower cavity (212) of the battery injection device (100); The lower cavity (212) rises and abuts against the upper cavity (211) of the battery injection device (100) to form a first container (21). The locking mechanism (302) abuts against the lower cavity (212) to lock the lower cavity (212) and the upper cavity (211).

6. The battery transfer method according to claim 3, characterized in that, Multiple injection and settling stations (30) are independently set up, and the mounting bracket (301) can slide out of the injection and settling station (30) along the track (303).

7. The battery transfer method according to any one of claims 1 to 6, characterized in that, The loading station (10), the multiple liquid injection and settling stations (30) and the unloading station (40) are all arranged along the same circumference of the transfer robot (20).

8. The battery transfer method according to claim 7, characterized in that, Also includes: The transfer robot (20) rotates cyclically between the loading station (10) and the multiple liquid injection and settling stations (30) until the multiple liquid injection and settling stations (30) are all loaded with the battery (22).

9. The battery transfer method according to claim 7, characterized in that, Also includes: The transfer robot (20) rotates cyclically between the multiple liquid injection and static placement stations (30) and the unloading station (40) until all the batteries (22) after liquid injection at the multiple liquid injection and static placement stations (30) are unloaded to the unloading station (40).

10. A battery electrolyte injection system for battery transfer using the battery transfer method according to any one of claims 1 to 9, characterized in that, include: The loading station (10) has multiple batteries (22) stacked up. Multiple liquid injection and settling stations (30) are provided; A battery liquid injection device (100) is provided at the liquid injection and static position (30). The transfer robot (20) is rotatable, and multiple liquid injection and static placement stations (30) are arranged along the same circumference of the transfer robot (20). The transfer robot (20) can grab the battery (22) from the loading station (10) and place it in the battery liquid injection device (100). The battery electrolyte filling device (100) includes: The metering device (1) includes an overfilling system, an injection chamber (17), and a plurality of metering cups (18) disposed in the injection chamber (17). The volume chamber of the metering cup (18) is connected to the injection chamber (17), and the overfilling system is connected to the injection chamber (17) to quantitatively inject electrolyte into the metering cup (18). The overfilling system includes a second liquid supply component (13) and a first liquid discharge component (14), wherein the second liquid supply component (13) is connected to the liquid injection chamber (17) to inject electrolyte into the liquid injection chamber (17), and the first liquid discharge component (14) is connected to the liquid injection chamber (17) and is adapted to discharge the liquid in the liquid injection chamber (17).

11. The battery electrolyte injection system according to claim 10, characterized in that, The battery electrolyte filling device (100) further includes: The liquid injection circulation device (2) includes a sealed first container (21) and a plurality of batteries (22) disposed in the first container (21), wherein the injection port of the battery (22) can be selectively connected to the outlet of the measuring cup (18); The positive and negative pressure circulation device (3) is suitable for evacuating and circulating positive pressure in the first container (21).

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