Centrifugal injection device and method

Abstract

The present invention relates to the technical field of lithium-ion battery production, and provides a centrifugal liquid injection device and method, the centrifugal liquid injection device comprising a centrifugal drive mechanism for placing a battery cell and driving the battery cell to rotate; a liquid injection mechanism, the liquid injection mechanism being arranged on the centrifugal drive mechanism and being used to inject liquid into the battery cell; and an electrolyte discharge mechanism, the electrolyte discharge mechanism being arranged on the centrifugal drive mechanism and being used to discharge excess electrolyte in the battery cell. The present invention drives the battery cell to rotate by the centrifugal drive mechanism to generate centrifugal force, and the liquid injection mechanism injects excess electrolyte into the battery cell, and under the action of the centrifugal force, the liquid injection and infiltration efficiency is improved, and then the excess electrolyte in the battery cell is discharged by the electrolyte discharge mechanism to ensure the quality of the battery.

Description

Technical Field

[0001] The invention relates to the technical field of lithium ion battery production, and in particular to a centrifugal liquid injection device and method. Background Art

[0002] In the production of lithium-ion batteries, electrolyte injection is a key process. The quality of this process directly affects the quality of the entire battery. Therefore, the centrifugal injection method was created, which uses a solid-liquid separation device to evenly distribute individual batteries around the shaft, and uses the centrifugal force generated by the movement of the shaft to accelerate the flow of the electrolyte and inject the electrolyte into the battery.

[0003] The existing centrifugal injection device only uses centrifugal force as the driving force for the flow of the electrolyte, the injection efficiency is low, and it is impossible to achieve excessive injection of the electrolyte. Summary of the invention

[0004] The invention provides a centrifugal liquid injection device and method, which are used to solve the defect of low liquid injection efficiency of battery core in the prior art, realize excessive liquid injection of battery core and improve liquid injection efficiency.

[0005] The present invention provides a centrifugal liquid injection device, comprising:

[0006] A centrifugal drive mechanism, used to place the battery core and drive the battery core to rotate;

[0007] A liquid injection mechanism, the liquid injection mechanism is arranged on the centrifugal drive mechanism and is used to inject liquid into the battery core;

[0008] The electrolyte discharge mechanism is arranged on the centrifugal drive mechanism and is used to discharge the excess electrolyte in the battery core.

[0009] According to a centrifugal liquid injection device provided by the present invention, the centrifugal drive mechanism includes a driving member, a rotating shaft and a turntable, the output end of the driving member is transmission-connected to the vertically arranged rotating shaft, the turntable is sleeved on the rotating shaft, a working plate is provided on the circumference of the turntable, and a placement position for placing the battery cell is provided on the working plate.

[0010] According to a centrifugal liquid injection device provided by the present invention, the liquid injection mechanism includes a liquid reservoir and a metering pump, the liquid reservoir is arranged above the rotating shaft through a frame, the metering pump is arranged on the turntable, the liquid inlet of the metering pump is connected to the liquid outlet of the liquid reservoir, and the liquid outlet of the metering pump is used to connect with the liquid injection port of the battery cell.

[0011] According to a centrifugal liquid injection device provided by the present invention, the electrolyte discharge mechanism includes a lifting assembly, and the operation plate is hinged to the peripheral side of the turntable;

[0012] The lifting assembly includes a sliding sleeve, a connecting rod and a spring. The sliding sleeve is mounted on the rotating shaft and can slide along the axial direction of the rotating shaft. The sliding sleeve is located between the liquid reservoir and the turntable. The sliding sleeve is hinged to the first end of the connecting rod. The second end of the connecting rod is hinged to the working plate. An elastic member is provided on the turntable, and the elastic member is adapted to the return of the sliding sleeve.

[0013] According to a centrifugal liquid injection device provided by the present invention, the placement position is provided with a weighing tray, and the battery cell is fixed on the weighing tray.

[0014] According to a centrifugal liquid injection device provided by the present invention, the electrolyte discharge mechanism includes a rotation drive mechanism capable of rotating the liquid injection port of the battery cell to a set angle.

[0015] According to a centrifugal liquid injection device provided by the present invention, the rotary drive mechanism includes a rotary motor arranged at a placement position, a weighing tray is provided at the placement position, the battery core is fixed on the weighing tray, and the output end of the rotary motor is connected to the weighing tray.

[0016] According to a centrifugal liquid injection device provided by the present invention, the rotation drive mechanism includes a rotation component located on the working plate on one side of the placement position, and the rotation component includes a rotation claw, and the rotation claw is used to clamp the battery core and drive the battery core to rotate.

[0017] According to a centrifugal liquid injection device provided by the present invention, the rotating assembly also includes a linear guide rail and a slider, the linear guide rail is arranged on the working plate on one side of the placement position, and the linear guide rail is perpendicular to the working plate, the slider is slidably arranged on the linear guide rail, and the rotating clamp is arranged on the slider.

[0018] According to a centrifugal liquid injection device provided by the present invention, the rotating shaft is provided with a hydraulic slip ring, the liquid reservoir is arranged on the hydraulic slip ring, and the liquid outlet of the liquid reservoir is connected to the liquid inlet of the hydraulic slip ring, and the liquid outlet of the hydraulic slip ring is connected to the metering pump.

[0019] The present invention also provides a centrifugal liquid injection method, comprising the following steps:

[0020] Mounting the battery cell on a centrifugal drive mechanism, turning on the centrifugal drive mechanism, and driving the battery cell to rotate;

[0021] Opening the liquid injection mechanism, and injecting liquid into the battery cell through the liquid injection mechanism;

[0022] Excess electrolyte in the battery cell is discharged through the electrolyte discharge mechanism.

[0023] According to a centrifugal liquid injection method provided by the present invention, the step of discharging excess electrolyte in the battery cell through the electrolyte discharge mechanism further includes:

[0024] The centrifugal drive mechanism and the liquid injection mechanism are closed, and the battery cell is lifted by a lifting assembly so that the liquid injection port of the battery cell is tilted toward the direction of the rotating shaft, and the excess electrolyte in the battery cell is discharged.

[0025] According to a centrifugal liquid injection method provided by the present invention, the step of discharging excess electrolyte in the battery cell through the electrolyte discharge mechanism further includes:

[0026] The liquid injection mechanism is closed, and the battery cell is driven to rotate by the rotary drive mechanism so that the liquid injection port of the battery cell faces a direction away from the rotation axis. The centrifugal drive mechanism drives the excess electrolyte in the battery cell to be discharged under the centrifugal effect.

[0027] The centrifugal liquid injection device and method provided by the present invention include a centrifugal drive mechanism for placing a battery cell and driving the battery cell to rotate; a liquid injection mechanism, which is arranged on the centrifugal drive mechanism and is used to inject liquid into the battery cell; and an electrolyte discharge mechanism, which is arranged on the centrifugal drive mechanism and is used to discharge excess electrolyte in the battery cell. The battery cell is driven to rotate by the centrifugal drive mechanism to generate centrifugal force, and the liquid injection mechanism injects excess electrolyte into the battery cell. Under the action of the centrifugal force, the liquid injection and infiltration efficiency are improved, and then the excess electrolyte in the battery cell is discharged by the electrolyte discharge mechanism to ensure the quality of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a structural schematic diagram of the first embodiment of the centrifugal liquid injection device provided by the present invention;

[0030] Figure 2 It is a structural schematic diagram of a second embodiment of the centrifugal liquid injection device provided by the present invention;

[0031] Figure 3 It is a structural schematic diagram of a weighing tray in the second embodiment of the centrifugal liquid injection device provided by the present invention;

[0032] Figure 4 It is a structural schematic diagram of the third embodiment of the centrifugal liquid injection device provided by the present invention;

[0033] Figure 5 It is a side view of the rotating assembly in the third embodiment of the centrifugal liquid injection device provided by the present invention;

[0034] Figure 6 is a top view of the rotating assembly in the third embodiment of the centrifugal liquid injection device provided by the present invention;

[0035] Reference numerals:

[0036] 1: Liquid reservoir; 2: Rotating shaft; 3: Infusion pipeline;

[0037] 4: Hydraulic slip ring; 5: Sleeve; 6: Connecting rod;

[0038] 7: Dosing pump; 8: Battery cell; 9: Operation board;

[0039] 10: weighing tray; 11: spring; 12: driven gear;

[0040] 13: driving gear; 14: driving member; 15: turntable;

[0041] 16: Rotating clamp; 17: Linear guide; 18: Slider;

[0042] 19: Weighing module; 20: Rotating motor. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the present invention clearer, the following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0044] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0045] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0046] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0048] Combine the following Figures 1 to 6 A centrifugal liquid injection device of the present invention is described, comprising:

[0049] A centrifugal drive mechanism, used to place the battery core 8 and drive the battery core 8 to rotate;

[0050] A liquid injection mechanism, which is arranged on the centrifugal drive mechanism and is used to inject liquid into the battery cell 8;

[0051] The electrolyte discharge mechanism is arranged on the centrifugal drive mechanism to discharge the excess electrolyte in the battery cell 8. It can be understood that the battery cell 8 is placed on the centrifugal drive mechanism, and the centrifugal drive mechanism drives the battery cell 8 to rotate, forming a centrifugal force on the battery cell 8. The injection mechanism is arranged on the centrifugal mechanism and rotates synchronously with the centrifugal mechanism to inject excess liquid into the battery cell 8. The electrolyte discharge mechanism is arranged on the centrifugal drive mechanism and rotates synchronously with the centrifugal mechanism to discharge the excess electrolyte in the battery cell 8.

[0052] That is to say, when the centrifugal drive mechanism drives the battery cell 8 to rotate, the injection mechanism injects excess electrolyte into the battery cell 8. Under the action of centrifugal force, the injection speed and infiltration efficiency of the electrolyte in the battery cell 8 are increased, and then the excess electrolyte in the battery cell 8 is discharged through the electrolyte discharge mechanism to complete the injection and infiltration of the battery cell 8.

[0053] It should be noted that the battery cell 8 is the smallest unit of the power battery and also an electric energy storage unit. A group of battery cells can form a module, and several modules can form a battery pack.

[0054] According to a centrifugal liquid injection device provided by the present invention, the centrifugal drive mechanism includes a driving member 14, a rotating shaft 2 and a turntable 15, the output end of the driving member 14 is connected to the vertically arranged rotating shaft 2 by transmission, the turntable 15 is sleeved on the rotating shaft 2, and a work plate 9 is provided on the peripheral side of the turntable 15, and a placement position for placing the battery cell 8 is provided on the work plate 9. It can be understood that the driving member 14 is used as a power output device, and the output end of the driving member 14 is connected to the rotating shaft 2 by transmission, thereby driving the rotating shaft 2 to rotate. The turntable 15 is sleeved on the rotating shaft 2, and the turntable 15 rotates synchronously with the rotating shaft 2. A work plate 9 is provided on the peripheral side of the turntable 15, and a placement position is provided on the work plate 9, and the battery cell 8 is clamped on the placement position.

[0055] It is worth noting that the number of work plates 9 can be set according to actual needs. In order to ensure stability during the rotation process, the work plates 9 are set in an even number, and the work plates 9 are set in an axisymmetric manner, thereby increasing the number of battery cells 8 that are filled with liquid at the same time. The driving member 14 can be a motor or a motor. Among them, the work plate 9 and the turntable 15 can be set as an integrally formed whole.

[0056] Among them, the rotating shaft 2 is sleeved with a driven gear 12, and the output end of the driving member 14 is provided with a driving gear 13, and the driving gear 13 meshes with the driven gear 12 to realize transmission. In this embodiment, the driven gear 12 is sleeved on the lower end of the rotating shaft 2, and the driving member 14 drives the driving gear 13 to rotate, and the driving gear 13 drives the driven gear 12 to rotate, thereby realizing the rotation of the rotating shaft 2. The hydraulic slip ring 4 is sleeved on the upper end of the rotating shaft 2, and the driven gear 12 and the hydraulic slip ring 4 are both fixedly installed relative to the rotating shaft 2.

[0057] In one embodiment, the driving member 14 is a motor, a driving wheel is provided at the output end of the motor, a driven wheel is provided at the lower end of the rotating shaft 2, and the driven wheel is connected to the driving wheel through a transmission belt.

[0058] According to a centrifugal liquid injection device provided by the present invention, the liquid injection mechanism includes a liquid reservoir 1 and a quantitative pump 7, the liquid reservoir 1 is arranged above the rotating shaft 2 through a frame, the quantitative pump 7 is arranged on the turntable 15, the liquid inlet of the quantitative pump 7 is connected to the liquid outlet of the liquid reservoir 1, and the liquid outlet of the quantitative pump 7 is used to connect with the liquid injection port of the battery cell 8. It can be understood that the liquid injection mechanism specifically includes a liquid reservoir 1 and a quantitative pump 7. The liquid reservoir 1 is used to store electrolyte, and is arranged above the rotating shaft 2 through a frame, so that a height difference is formed between the liquid outlet of the liquid reservoir 1 and the liquid injection port of the battery cell 8, thereby increasing the flow rate of the electrolyte and thus increasing the liquid injection speed. The quantitative pump 7 is arranged on the turntable 15 and rotates synchronously with the turntable 15. The liquid inlet of the quantitative pump 7 is connected to the liquid outlet of the liquid reservoir 1 through the infusion pipeline 3, and the liquid outlet of the quantitative pump 7 is connected to the liquid injection port of the battery cell 8 through the injection pipeline, so as to realize the quantitative injection of the electrolyte.

[0059] That is to say, the amount of electrolyte pumped by the metering pump 7 is set to adjust the injection amount. The metering pump 7 provides pumping power for excess electrolyte, thereby improving the injection efficiency.

[0060] like Figure 1 As shown, according to a centrifugal liquid injection device provided by the present invention, the electrolyte discharge mechanism includes a lifting assembly, and the working plate 9 is hinged to the peripheral side of the rotating disk 15; the lifting assembly includes a sleeve 5, a connecting rod 6 and a spring 11, the sleeve 5 is sleeved on the rotating shaft 2, and can slide along the axial direction of the rotating shaft 2, the sleeve 5 is located between the liquid reservoir 1 and the rotating disk 15, the sleeve 5 is hinged to the first end of the connecting rod 6, the second end of the connecting rod 6 is hinged to the working plate 9, and the rotating disk 15 is provided with an elastic member, and the elastic member is adapted to the return of the sleeve 5. It can be understood that the lifting assembly is used to lift the working plate 9, the peripheral side of the rotating disk 15 is hinged with the working plate 9, and the working plate 9 can be rotated between the horizontal direction and the vertical direction above the rotating disk 15, so that the working plate 9 is rotated to the top of the rotating disk 15, so as to realize the tilting of the battery cell 8, and the liquid injection port of the battery cell 8 faces the inside, that is, toward the direction of the rotating shaft 2, so that the excess electrolyte is discharged from the liquid injection port of the battery cell 8.

[0061] Specifically, the lifting assembly includes a sleeve 5, a connecting rod 6 and a spring 11. The sleeve 5 is sleeved on the rotating shaft 2 and can slide freely up and down along the axial direction of the rotating shaft 2, that is, in the vertical direction. The first end of the connecting rod 6 is hinged to the outer wall of the sleeve 5 and moves synchronously with the sleeve 5. The second end of the connecting rod 6 is hinged to the upper end surface of the working plate 9, and the connecting rod 6 realizes the transmission effect on the working plate 9. An elastic member is provided on the turntable 15, and the elastic member is adapted to the return of the sleeve 5 to realize elastic support return. In this embodiment, the elastic member is a spring 11, and the spring 11 is coaxially sleeved on the rotating shaft 2. A plurality of springs 11 can also be provided, and the plurality of springs 11 are evenly arranged on the circumference of the rotating shaft 2 to realize elastic support for the sleeve 5.

[0062] That is, when the driving member 14 drives the turntable 15 and drives the working plate 9 to rotate, the working plate 9 moves downward under the action of centrifugal force and is flush with the turntable 15. The connecting rod 6 drives the sliding sleeve 5 to move downward along the axial direction of the rotating shaft 2, and the sliding sleeve 5 squeezes the elastic member. Under the action of the quantitative pump 7, the electrolyte in the liquid reservoir 1 is transported to the injection port of the battery cell 8 through the liquid delivery pipe 3 and the injection pipe. The battery cell 8 is placed in the placement position so that the injection port of the battery cell 8 faces inward;

[0063] When the injection and infiltration are completed, the metering pump 7 and the driving member 14 are closed, the turntable 15 and the working plate 9 stop rotating, the centrifugal force is zero, and under the action of the return elastic force of the elastic member on the sliding sleeve 5, the sliding sleeve 5 moves upward along the axial direction of the rotating shaft 2, and generates a pulling force on the working plate 9 through the connecting rod 6, so that the working plate 9 is tilted toward the top of the turntable 15 and toward the inside, and the battery cell 8 is tilted, so that the excess electrolyte in the battery cell 8 is discharged from the injection port of the battery cell 8.

[0064] In one embodiment, a groove is provided on the circumferential side of the turntable 15 and is arranged along the radial direction of the turntable 15 , and the hinged end of the working plate 9 is connected to the groove through a pin shaft.

[0065] According to a centrifugal liquid injection device provided by the present invention, a weighing tray 10 is provided at the placement position, and the battery cell 8 is fixed on the weighing tray 10. It can be understood that the weighing tray 10 is provided at the placement position, and the battery cell 8 is fixedly clamped on the weighing tray 10 to ensure the stable assembly of the battery cell 8, which is stable and reliable under centrifugal action. The weight of the battery cell 8 is monitored in real time by the weighing tray 10 to ensure the accuracy of liquid injection.

[0066] A weighing module 19 is disposed on the bottom side of the weighing tray 10 to achieve real-time transmission of the weighing result.

[0067] According to a centrifugal liquid injection device provided by the present invention, the electrolyte discharge mechanism includes a rotary drive mechanism that can rotate the liquid injection port of the battery cell 8 to a set angle. It can be understood that in the initial position of the battery cell 8, the liquid injection port of the battery cell 8 faces the direction of the rotating shaft 2; after the electrolyte infiltration is completed, the rotary drive mechanism drives the battery cell 8 to rotate the set angle to prevent the electrolyte discharged from the liquid injection port of the battery cell 8 from splashing onto the rotating shaft 2.

[0068] It is worth noting that the rotation setting angle must satisfy the requirement that after the battery cell 8 rotates, the electrolyte discharged from the liquid injection port of the battery cell 8 will not splash onto the rotating shaft 2, thereby keeping the rotating shaft 2 clean. The rotation setting angle is preferably 180°, so that the liquid injection port of the battery cell 8 faces away from the rotating shaft 2.

[0069] like Figure 2 and Figure 3 As shown, according to a centrifugal liquid injection device provided by the present invention, the rotary drive mechanism includes a rotary motor 20 arranged at the placement position, a weighing tray 10 is provided at the placement position, the battery cell 8 is fixed on the weighing tray 10, and the output end of the rotary motor 20 is connected to the weighing tray 10. It can be understood that the placement position is also provided with a rotary motor 20, and the output end of the rotary motor 20 is connected to the bottom side of the weighing tray 10 to drive the weighing tray 10 to rotate, accelerate the infiltration of the electrolyte, and improve the liquid injection efficiency. At the same time, the rotation of the liquid injection port of the battery cell 8 is realized, and the direction of the liquid injection port is adjusted.

[0070] Specifically, when the weight monitored by the weighing tray 10 reaches the target value, that is, after the battery cell 8 has completed the overfilling, the driving member 14 continues to drive the rotating shaft 2 to rotate, and the rotating motor 20 drives the weighing tray 10 to rotate horizontally. In this embodiment, the rotation angle is 180°, so that the direction of the filling port of the battery cell 8 is turned from the inside to the outside;

[0071] Under the action of centrifugation, the electrolyte continues to infiltrate the battery cell 8. At the same time, the excess electrolyte is thrown out from the injection port of the battery cell 8 to the outside to prevent contamination of the rotating shaft 2, thereby achieving the discharge of the excess electrolyte.

[0072] According to a centrifugal liquid injection device provided by the present invention, the rotary drive mechanism includes a rotary assembly on the work plate 9 on one side of the placement position, and the rotary assembly includes a rotary clamp 16, and the rotary clamp 16 is used to clamp the battery cell 8 and drive the battery cell 8 to rotate. It can be understood that a rotary assembly is provided on the work plate 9 on one side of the placement position. The rotary assembly includes a rotary clamp 16, which is used to stably clamp the battery cell 8 to ensure stability under centrifugal action, and can drive the battery cell 8 to rotate, realize the rotation drive of the liquid injection port of the battery cell 8, and change the direction of the liquid injection port of the battery cell 8, specifically, from rotating toward the inside to toward the outside.

[0073] like Figures 4 to 6According to a centrifugal liquid injection device provided by the present invention, the rotating assembly further includes a linear guide 17 and a slider 18, the linear guide 17 is arranged on the work plate 9 on one side of the placement position, and the linear guide 17 is perpendicular to the work plate 9, the slider 18 is slidably arranged on the linear guide 17, and the rotating jaw 16 is arranged on the slider 18. It can be understood that the rotating assembly further includes a linear guide 17 and a slider 18, the linear guide 17 is perpendicular to the work plate 9, that is, vertically arranged, and is located on the work plate 9 on one side of the placement position, the slider 18 is slidably arranged on the linear guide 17, and can slide freely in the vertical direction, the rotating jaw 16 is arranged on the slider 18, and the rotating jaw 16 and the slider 18 move up and down synchronously.

[0074] Specifically, when the driving member 14 drives the turntable 15 and drives the working plate 9 to rotate, the quantitative pump 7 pumps the excess electrolyte from the liquid reservoir 1 through the delivery pipe and the injection pipe to the injection port of the battery cell 8, and the injection speed and the infiltration efficiency are improved under the action of centrifugal force;

[0075] When the weight monitored by the weighing tray 10 reaches the target value, that is, after the battery cell 8 has completed the overfilling, the slider 18 drives the rotating jaw 16, and the rotating jaw 16 clamps the battery cell 8 and moves upward along the linear guide rail 17, so that the bottom side of the battery cell 8 is separated from the weighing tray 10 to prevent the battery cell 8 from colliding with the weighing tray 10 during the rotation process, and then the rotating air claw drives the battery cell 8 to rotate 180°, so that the direction of the liquid filling port of the battery cell 8 is changed from the inside to the outside;

[0076] The slider 18 drives the rotating jaw 16, and the rotating jaw 16 clamps the rotated battery cell 8, moves downward along the linear guide rail 17, and is placed on the weighing tray 10, and continues to rotate centrifugally. The electrolyte continues to infiltrate the battery cell 8. At the same time, the excess electrolyte is thrown out to the outside from the injection port of the battery cell 8 to prevent contamination of the rotating shaft 2, thereby achieving the discharge of excess electrolyte.

[0077] According to a centrifugal liquid injection device provided by the present invention, a rotating shaft 2 is provided with a hydraulic slip ring 4, a liquid reservoir 1 is provided on the hydraulic slip ring 4, and a liquid outlet of the liquid reservoir 1 is connected to a liquid inlet of the hydraulic slip ring 4, and the liquid outlet of the hydraulic slip ring 4 is connected to a metering pump 7. It can be understood that the rotating shaft 2 is provided with a hydraulic slip ring 4, and the hydraulic slip ring 4 and the rotating shaft 2 can keep synchronous rotation. The liquid outlet of the liquid reservoir 1 is connected to the liquid inlet of the hydraulic slip ring 4, and the liquid outlet of the hydraulic slip ring 4 is connected to the infusion pipeline 3, and the electrolyte in the liquid reservoir 1 enters the hydraulic slip ring 4 from the liquid outlet, and flows into the infusion pipeline 3 from the liquid outlet of the hydraulic slip ring 4, so as to realize the transportation of the electrolyte, and at the same time realize the synchronous rotation of the infusion pipeline 3 and the rotating shaft 2.

[0078] According to a centrifugal liquid injection device provided by the present invention, it also includes a controller, which is electrically connected to the centrifugal drive mechanism and the liquid injection mechanism. It can be understood that the input end of the controller is electrically connected to the weighing module 19, and the output end of the controller is electrically connected to the drive member 14 and the rotating motor 20 or the rotating jaw 16. The controller receives the real-time weight of the battery cell 8 measured by the weighing module 19, and compares it with the rated weight preset in the controller, and then sends corresponding instructions to the drive member 14 and the rotating motor 20 or the rotating jaw 16.

[0079] In one embodiment, a recovery container is further included. The recovery container sealing cover is arranged on the outside of the centrifugal drive mechanism. A liquid collecting channel is arranged at the bottom end of the recovery container to recover the excess electrolyte discharged from the battery cell 8.

[0080] The centrifugal liquid injection method provided by the present invention is described below. The centrifugal liquid injection method described below and the centrifugal liquid injection device described above can be referenced to each other.

[0081] The present invention also provides a centrifugal liquid injection method, comprising the following steps:

[0082] Assemble the battery cell 8 on the centrifugal drive mechanism, turn on the centrifugal drive mechanism, and drive the battery cell 8 to rotate;

[0083] Open the liquid injection mechanism and inject liquid into the battery cell 8 through the liquid mechanism;

[0084] The excess electrolyte in the battery cell 8 is discharged by the electrolyte discharge mechanism.

[0085] According to a centrifugal liquid injection method provided by the present invention, the step of discharging excess electrolyte in the battery cell 8 through the electrolyte discharge mechanism also includes:

[0086] The centrifugal drive mechanism and the liquid injection mechanism are closed, and the battery cell 8 is lifted by the lifting assembly so that the liquid injection port of the battery cell 8 is tilted toward the direction of the rotating shaft, and the excess electrolyte in the battery cell 8 is discharged.

[0087] According to a centrifugal liquid injection method provided by the present invention, the step of discharging excess electrolyte in the battery cell 8 through the electrolyte discharge mechanism also includes:

[0088] The injection mechanism is closed, and the battery cell 8 is driven to rotate by the rotary drive mechanism so that the injection port of the battery cell 8 faces away from the rotation shaft 2. The centrifugal drive mechanism drives the excess electrolyte in the battery cell 8 to be discharged under the centrifugal effect.

[0089] A centrifugal liquid injection method provided in Example 1 of the present invention specifically comprises the following steps:

[0090] Assemble the battery cell 8 on the weighing tray 10 on the placement position of the working plate 9, and ensure that the liquid injection port of the battery cell 8 faces inward, turn on the driving member 14, drive the rotating shaft 2, and drive the rotating disk 15, the working rotating disk 15 and the battery cell 8 to rotate, and generate a centrifugal effect on the battery cell 8;

[0091] The working plate 9 moves downward under the action of centrifugal force and is flush with the rotating disk 15. The connecting rod 6 drives the sliding sleeve 5 to move downward along the axial direction of the rotating shaft 2, and the sliding sleeve 5 squeezes the elastic member.

[0092] The metering pump 7 is turned on to inject the electrolyte in the liquid reservoir 1 into the battery cell 8 from the injection port of the battery cell 8 in an excess manner through the liquid infusion pipe 3 and the liquid injection pipe. Under the action of centrifugal force, the injection speed and the infiltration efficiency are increased;

[0093] The weighing module 19 at the bottom of the weighing tray 10 measures the weight of the battery cell 8 in real time, and transmits the measured value to the controller, and makes a judgment with the first threshold value input into the controller. If the measured value is equal to the first threshold value, it means that the injection of excess electrolyte has been completed;

[0094] The controller sends a stop command to the driving member 14 and the metering pump 7, the turntable 15 and the working plate 9 stop rotating, the centrifugal force is zero, and the sliding sleeve 5 moves upward along the axial direction of the rotating shaft 2 under the return elastic force of the elastic member on the sliding sleeve 5, and generates a pulling force on the working plate 9 through the connecting rod 6, so that the working plate 9 is tilted above the turntable 15 and toward the inside, and the battery cell 8 is tilted, so that the excess electrolyte in the battery cell 8 is discharged from the injection port of the battery cell 8;

[0095] When the measured value monitored by the weighing module 19 is equal to the second threshold value in the controller, it indicates that all the excess electrolyte has been discharged, and the injection and wetting operations of the battery cell 8 are completed.

[0096] According to a centrifugal liquid injection method provided by the present invention, the step of discharging excess electrolyte in the battery cell 8 through the electrolyte discharge mechanism also includes:

[0097] The liquid injection mechanism is closed, and the battery cell 8 is driven to rotate by the rotary motor 20 so that the liquid injection port of the battery cell 8 faces outward, and the centrifugal drive mechanism drives the excess electrolyte in the battery cell 8 to be discharged under the centrifugal effect.

[0098] Embodiment 2 of the present invention further provides a centrifugal liquid injection method, which specifically comprises the following steps:

[0099] Assemble the battery cell 8 on the weighing tray 10 on the placement position of the working plate 9, and ensure that the liquid injection port of the battery cell 8 faces inward, turn on the driving member 14, drive the rotating shaft 2, and drive the rotating disk 15, the working rotating disk 15 and the battery cell 8 to rotate, and generate a centrifugal effect on the battery cell 8;

[0100] The metering pump 7 is turned on to inject the electrolyte in the liquid reservoir 1 into the battery cell 8 from the injection port of the battery cell 8 in an excess manner through the liquid infusion pipe 3 and the liquid injection pipe. Under the action of centrifugal force, the injection speed and the infiltration efficiency are increased;

[0101] The weighing module 19 at the bottom of the weighing tray 10 measures the weight of the battery cell 8 in real time, and transmits the measured value to the controller, and makes a judgment with the first threshold value input into the controller. If the measured value is equal to the first threshold value, it means that the injection of excess electrolyte has been completed;

[0102] The controller sends a stop command to the metering pump 7, and the driving member 14 continues to drive the rotation. The controller sends a start command to the rotating motor 20, and the rotating motor 20 drives the weighing tray 10 to rotate horizontally by 180°, so that the direction of the liquid injection port of the battery cell 8 is changed from the inside to the outside;

[0103] Under the action of centrifugation, the electrolyte continues to infiltrate the battery cell 8. At the same time, excess electrolyte is thrown out from the injection port of the battery cell 8 to the outside to prevent contamination of the rotating shaft 2. When the measurement value monitored by the weighing module 19 is equal to the second threshold value in the controller, it means that the excess electrolyte has been completely discharged, and the injection and infiltration operations of the battery cell 8 are completed. The controller sends a stop command to the drive member 14.

[0104] Embodiment 3 of the present invention further provides a centrifugal liquid injection method, which specifically comprises the following steps:

[0105] Assemble the battery cell 8 on the weighing tray 10 on the placement position of the working plate 9, and ensure that the liquid injection port of the battery cell 8 faces inward, turn on the driving member 14, drive the rotating shaft 2, and drive the rotating disk 15, the working rotating disk 15 and the battery cell 8 to rotate, and generate a centrifugal effect on the battery cell 8;

[0106] The metering pump 7 is turned on to inject the electrolyte in the liquid reservoir 1 into the battery cell 8 from the injection port of the battery cell 8 in an excess manner through the liquid infusion pipe 3 and the liquid injection pipe. Under the action of centrifugal force, the injection speed and the infiltration efficiency are increased;

[0107] The weighing module 19 at the bottom of the weighing tray 10 measures the weight of the battery cell 8 in real time, and transmits the measured value to the controller, and makes a judgment with the first threshold value input into the controller. If the measured value is equal to the first threshold value, it means that the injection of excess electrolyte has been completed;

[0108] The controller sends a stop command to the metering pump 7, the driving member 14 continues to drive the rotation or stops rotating, the slider 18 drives the rotating jaw 16, the rotating jaw 16 clamps the battery cell 8, and moves upward along the linear guide rail 17, so that the bottom side of the battery cell 8 is separated from the weighing tray 10, to prevent the battery cell 8 from colliding with the weighing tray 10 during the rotation process, and then the rotating air claw drives the battery cell 8 to rotate 180°, so that the direction of the liquid injection port of the battery cell 8 is changed from the inside to the outside;

[0109] The slider 18 drives the rotating clamp 16, which clamps the rotated battery cell 8, moves downward along the linear guide 17, and is placed on the weighing tray 10, (if the driving member 14 is turned off, it is turned on) and continues to rotate centrifugally, and the electrolyte continues to infiltrate the battery cell 8. At the same time, the excess electrolyte is thrown out from the injection port of the battery cell 8 to the outside to prevent contamination of the rotating shaft 2, thereby achieving the discharge of the excess electrolyte;

[0110] When the measured value monitored by the weighing module 19 is equal to the second threshold value in the controller, it indicates that all the excess electrolyte has been discharged, and the injection and wetting operations of the battery cell 8 are completed, and the controller sends a stop command to the driving member 14 .

[0111] The centrifugal liquid injection device and method provided by the present invention include a centrifugal drive mechanism for placing a battery cell and driving the battery cell to rotate; a liquid injection mechanism, which is arranged on the centrifugal drive mechanism and is used to inject liquid into the battery cell; and an electrolyte discharge mechanism, which is arranged on the centrifugal drive mechanism and is used to discharge excess electrolyte in the battery cell. The battery cell is driven to rotate by the centrifugal drive mechanism to generate centrifugal force, and the liquid injection mechanism injects excess electrolyte into the battery cell. Under the action of the centrifugal force, the liquid injection and infiltration efficiency are improved, and then the excess electrolyte in the battery cell is discharged by the electrolyte discharge mechanism to ensure the quality of the battery.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A centrifugal liquid injection device, characterized in that: include: A centrifugal drive mechanism, used to place the battery core and drive the battery core to rotate; A liquid injection mechanism, the liquid injection mechanism is arranged on the centrifugal drive mechanism and is used for injecting excess liquid into the battery cell; An electrolyte discharge mechanism, the electrolyte discharge mechanism is arranged on the centrifugal drive mechanism, and is used to discharge excess electrolyte in the battery core; The centrifugal drive mechanism comprises a driving member, a rotating shaft and a rotating disk, wherein the output end of the driving member is drivingly connected to the vertically arranged rotating shaft, the rotating disk is sleeved on the rotating shaft, a work plate is provided on the peripheral side of the rotating disk, and a placement position for placing the battery cell is provided on the work plate; The electrolyte discharge mechanism includes a lifting assembly, and the working plate is hinged to the peripheral side of the rotating disk; The liquid injection mechanism includes a liquid reservoir, and the liquid reservoir is mounted above the rotating shaft through a frame; The lifting assembly includes a sliding sleeve, a connecting rod and a spring. The sliding sleeve is sleeved on the rotating shaft and can slide along the axial direction of the rotating shaft. The sliding sleeve is located between the liquid reservoir and the rotating disk. The sliding sleeve is hinged to the first end of the connecting rod. The second end of the connecting rod is hinged to the working plate. The rotating disk is provided with an elastic member, and the elastic member is adapted to return to the sliding sleeve. The rotating shaft is provided with a hydraulic slip ring, and the liquid reservoir is arranged on the hydraulic slip ring.

2. The centrifugal liquid injection device according to claim 1, characterized in that: The liquid injection mechanism also includes a metering pump, which is arranged on the turntable. The liquid inlet of the metering pump is connected to the liquid outlet of the liquid reservoir, and the liquid outlet of the metering pump is used to connect to the liquid injection port of the battery cell.

3. The centrifugal liquid injection device according to claim 1, characterized in that: The placement position is provided with a weighing tray, and the battery core is fixed on the weighing tray.

4. The centrifugal liquid injection device according to claim 2, characterized in that: The liquid outlet of the liquid reservoir is connected to the liquid inlet of the hydraulic slip ring, and the liquid outlet of the hydraulic slip ring is connected to the metering pump.

5. A centrifugal injection method, characterized in that: Applicable to the centrifugal liquid injection device according to any one of claims 1 to 4, the centrifugal liquid injection method comprises the following steps: Mounting the battery cell on a centrifugal drive mechanism, turning on the centrifugal drive mechanism, and driving the battery cell to rotate; Opening the liquid injection mechanism, and injecting liquid into the battery cell through the liquid injection mechanism; Excess electrolyte in the battery cell is discharged through the electrolyte discharge mechanism.

6. The centrifugal liquid injection method according to claim 5, characterized in that: The step of discharging excess electrolyte in the battery cell through the electrolyte discharging mechanism further includes: The centrifugal drive mechanism and the liquid injection mechanism are closed, and the battery cell is lifted by a lifting assembly so that the liquid injection port of the battery cell is tilted toward the direction of the rotating shaft, and the excess electrolyte in the battery cell is discharged.

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