A battery turnover and unloading system and method

Abstract

The present application relates to hard-shell battery transport equipment technical field, specifically provides a battery turnover unloading system and method, the system includes turnover unit and vertical clamping jaw, the turnover unit is arranged in the unloading station, is used for receiving and clamping multiple horizontal placement batteries, and is overall overturned to vertical state through rotating mechanism;Vertical clamping jaw is arranged between turnover unit and material frame placement position, is used for clamping battery from the vertical state in turnover unit and is placed vertically in material frame.This application places the battery in the turnover unit, changes the battery posture with the turnover unit, reduces the risk of falling during the movement of the battery;At the same time, the subsequent vertical clamping jaw can complete the vertical placement of the battery in the material frame action by translation and vertical clamping, without the need for complex angle turning and other changes of mechanical hand, improve the battery unloading rate, at the same time, realize the high density, non-destructive and efficient placement of battery in material frame.

Description

Technical Field

[0001] This invention relates to the field of hard-shell battery transfer equipment technology, specifically providing a battery flipping and unloading system and method. Background Technology

[0002] In automated production lines manufacturing rigid-cased batteries such as square aluminum and steel-cased batteries, batteries that have completed airtightness testing need to be quickly and reliably transferred to designated storage areas, such as material crates (or turnover boxes). The efficiency and safety of this process directly affect the overall production cycle time and the quality of the finished batteries.

[0003] Currently, after testing, the batteries are placed horizontally on a transfer tray at the unloading station, and the battery handling process generally uses suction cup clamps as end effectors. During operation, the robot arm manipulates the suction cups to directly adhere to the flat surface of the battery casing, picking up the battery from the horizontal tray at the testing station and then placing it in the material box.

[0004] In existing technologies, batteries are moved by a robotic arm that drives a suction cup. However, placing the battery into the designated position in the material box requires complex angle flipping and other changes, which results in low transfer efficiency and is prone to placement errors, causing the battery to scrape or collide when placed into the material box.

[0005] Therefore, existing handling methods are difficult to apply to modern battery production environments with large-scale, high-efficiency requirements. Thus, a new battery feeding method and system are urgently needed. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a novel battery feeding method and system to ensure battery feeding rate and placement accuracy, thereby guaranteeing the subsequent quality of the battery.

[0007] The technical solution of the device of the present invention is as follows:

[0008] A battery flipping and unloading system includes a flipping unit and a vertical gripper. The flipping unit is located at the unloading station and is used to receive and clamp multiple horizontally placed batteries, and flip them as a whole to a vertical state through a rotating mechanism. The vertical gripper is located between the flipping unit and the material frame placement position and is used to clamp the vertically positioned batteries from the flipping unit and vertically place them into the material frame.

[0009] In this solution, qualified batteries are placed directly into the flipping unit. The flipping unit changes the battery's posture, reducing the risk of the battery falling during movement. At the same time, the active flipping enables rapid and efficient posture changes for the battery. This allows the subsequent vertical gripper to complete the vertical placement of the battery into the material frame simply by translation and vertical clamping, eliminating the need for complex angle flipping and other changes by the robotic arm. This effectively improves the battery unloading rate while achieving high-density, damage-free stacking of batteries within the material frame, thus increasing the single loading capacity and material frame loading efficiency.

[0010] Preferably, the flipping unit includes a frame with a horizontally mounted motor-driven rotating shaft. A flipping placement platform is fixedly mounted on the rotating shaft, and the platform has one or more battery placement positions, including horizontal and vertical positions. The motor drives the rotating shaft to rotate, causing the flipping placement platform to switch between the horizontal and vertical positions. By driving the rotating shaft to rotate the entire flipping placement platform, the synchronous and smooth flipping of an entire row of batteries is achieved. Furthermore, the multiple battery placement positions can correspond to the positions of the front-end transfer tray, allowing the flipping unit to adapt to the front-end battery handling equipment. This enables the flipping unit to place multiple batteries at once at the unloading station, thereby improving the battery unloading rate.

[0011] Preferably, the flipping placement platform is provided with multiple positioning bases, each positioning base having a placement groove. The positioning bases are detachably installed on the flipping placement platform, and the placement grooves form the battery placement positions. The placement grooves include a straight groove angle adapted to the shape of the battery. The positioning base grooves are provided with suction cup openings, which are connected to a negative pressure cylinder on the flipping placement platform.

[0012] In this solution, the placement groove and straight groove angle of the positioning base provide initial positioning, while negative pressure adsorption ensures the stability of the battery during the flipping process. At the same time, the detachable positioning base design allows the system to be quickly changed and adapted to various battery specifications, improving the versatility of the equipment.

[0013] To facilitate the vertical gripper to grip a single battery, the positioning base is provided with a gripping notch, and the flipping placement platform is provided with a notch adapted to the gripping notch. When the flipping placement platform is in the vertical position, the opening of the gripping notch faces vertically upward, allowing the gripping arm of the vertical gripper to extend in and grip the battery.

[0014] To prevent the batteries from being gripped differently by the vertical grippers and thus scratched or damaged when placed in the material box, the flipping placement platform is also equipped with a repositioning mechanism. The repositioning mechanism includes two pushers with mutually perpendicular pushing directions. Each battery placement position corresponds to one set of repositioning mechanisms. The pushers are pushed by a pusher cylinder located on the lower surface of the flipping placement platform. The placement groove includes a straight groove angle adapted to the shape of the battery. The pushers are used to push the battery placed in the placement groove to abut against the straight groove angle.

[0015] In this solution, since the pusher is a movable part, the size of the placement groove can be finely adjusted by the initial position of the two pushers. This allows the same positioning base to accommodate batteries of similar model and size. At the same time, the two vertical pushers push the battery to a fixed straight groove angle, eliminating battery posture and position errors, ensuring that the battery position is absolutely consistent each time it is gripped, and guaranteeing the accuracy of the subsequent vertical gripper gripping the battery and placing it into the material box.

[0016] Preferably, the pushing component includes a vertical push plate and a buffer block connected to the pushing cylinder. A horizontal push block is provided on the top of the vertical push plate, which is used to abut against the side wall of the battery. A sliding groove is provided on the buffer block. The bottom of the vertical push plate is slidably disposed in the sliding groove by a guide pin. The sliding direction of the vertical push plate is the same as its pushing direction. A buffer spring is provided between the vertical push plate and the sliding groove.

[0017] In this design, the punch block, sliding groove, and buffer spring constitute a buffer mechanism, which makes the pusher make a flexible "soft contact" when it contacts and pushes the battery. This effectively avoids scratching the battery surface and absorbs the impact when positioning is terminated, thus protecting the battery product.

[0018] Preferably, the frame is provided with two vertical plates, and the two ends of the rotating shaft are rotatably mounted on the two plates through bearings. A photoelectric sensor is provided on one side of the plate along the axis of the rotating shaft, and a trigger plate extends radially outward from the rotating shaft. The trigger plate can rotate with the rotating shaft to two angles corresponding to the horizontal and vertical positions respectively, and trigger the corresponding photoelectric sensor.

[0019] In this scheme, the combination of the trigger plate and the photoelectric sensor provides the control system with a precise position signal indicating whether the flipping is in place, ensuring the repeatability of the flipping action and the reliability of the system operation.

[0020] Preferably, the positioning base is further provided with a positioning indication mechanism. The positioning indication mechanism includes a mounting box fixed to the flipping placement platform, and an elastic contact and a stationary contact disposed in the mounting box. The elastic contact has a trigger end that extends to the inside of a right-angled side of the straight groove in the placement groove. When the battery is pushed by the repositioning mechanism and its side wall abuts against the right-angled side, the battery presses against the trigger end, causing the elastic contact to undergo elastic deformation and contact the stationary contact, thereby generating an electrical signal indicating that the battery has been positioned.

[0021] In this solution, the mechanism consisting of the elastic contact piece and the stationary contact point generates physical contact and sends an electrical signal the instant the battery is pressed against the right-angled edge. This provides the system with deterministic feedback that the battery has been precisely positioned, thus avoiding clamping or placement failures caused by positioning failure.

[0022] Preferably, the flip-top platform is provided with a through-beam light curtain, with the transmitting end and receiving end of the through-beam light curtain respectively located on both sides of the flip-top platform.

[0023] In this solution, the through-beam light curtain can detect whether the battery is placed flat on the positioning base, thus avoiding subsequent repositioning failures and the battery falling off when flipping the battery.

[0024] A battery flipping and unloading method using the system described above includes the following steps:

[0025] S1, rough placement, the batteries that have passed the airtightness test are horizontally placed into the positioning base in the flipping unit located at the unloading station and in a horizontal position;

[0026] S2, precise positioning, the pusher pushes the battery so that the battery abuts against the straight groove corner on the positioning base;

[0027] S3, adsorption and flipping: the suction cup opening generates negative pressure to adsorb the battery, and the motor drives the flipping placement platform to a vertical position.

[0028] S4, clamping and placing: the vertical gripper arms extend vertically downwards into the clamping notch to clamp the battery, and the suction cup opening stops negative pressure adsorption after clamping.

[0029] By integrating the four steps of roughing, precise positioning, adsorption and flipping, and clamping and placing, hardware innovation is solidified into the optimal work process, ensuring efficient, damage-free and automated operation from the completion of inspection to packing and stacking.

[0030] The beneficial effects of this invention are:

[0031] This invention incorporates a flipping unit, allowing batteries to be placed within it. By changing the battery's orientation through the flipping unit, the battery's fall can be effectively prevented. After the flipping unit changes the battery's orientation, the subsequent vertical grippers can complete the vertical placement of the battery into the material frame simply by translating and vertically clamping it, eliminating the need for complex angle flipping and other changes by the robotic arm. This increases the battery unloading rate while achieving high-density, damage-free stacking of batteries within the material frame, thereby improving the single loading capacity and the material frame loading efficiency. Attached Figure Description

[0032] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a three-dimensional schematic diagram of the flipping unit of the present invention;

[0034] Figure 2 This is a three-dimensional schematic diagram of the flip-up placement platform of the present invention;

[0035] Figure 3 This is a three-dimensional schematic diagram of the push-out component of the present invention;

[0036] Figure 4 This is a schematic diagram of the motor and shaft of the present invention;

[0037] Figure 5 This is a schematic diagram of the aiming and prompting mechanism of the present invention.

[0038] In the above figures, the corresponding reference numerals are as follows:

[0039] 11-Frame, 12-Motor, 13-Shaft, 131-Trigger plate, 132-First photoelectric sensor, 133-Second photoelectric sensor, 14-Flipping placement platform, 15-Positioning base, 151-Placement groove, 1511-Straight groove angle, 152-Suction cup opening, 153-Clamping notch, 16-Alignment indicator mechanism, 161-Mounting box, 162-Elastic contact plate, 1621-Trigger end, 163-Static contact point, 17-Through-beam light curtain, 18-Pushing component, 181-Buffer block, 182-Vertical push plate, 183-Horizontal push block, 184-Guide pin, 185-Buffer spring, 186-Pushing cylinder, 2-Battery. Detailed Implementation

[0040] The technical solution of the present invention will be clearly and completely described in conjunction with the accompanying drawings and through specific implementation methods of the embodiments of the present invention.

[0041] Example 1:

[0042] like Figure 1 As shown, this embodiment provides a battery flipping and unloading system. The system mainly includes a flipping unit and vertical grippers, and the entire system is coordinated and controlled by a central controller. The flipping unit is installed at the unloading station of the airtightness testing production line to receive and clamp multiple batteries 2 that have passed the airtightness test. The flipping unit includes a frame 11, on which a rotating shaft 13 driven by a motor 12 (a servo motor) is horizontally mounted. A flipping placement table 14 is fixedly mounted on the rotating shaft 13. Multiple battery 2 placement positions are arranged along the length of the flipping placement table 14. The number and spacing of these battery 2 placement positions are adapted to the number and spacing of batteries 2 transferred at one time by the transfer tool in the front-end airtightness testing production line, thereby achieving simultaneous reception and processing of multiple batteries 2. Of course, a flipping unit can contain multiple sets of rotating shafts 13 and placement tables.

[0043] Specifically, the flipping placement table 14 has two key stations: a horizontal receiving position and a vertical picking position. The motor 12 drives the rotating shaft 13 to rotate in both directions, enabling the flipping placement table 14 to precisely switch between the horizontal receiving position and the vertical picking position. The vertical gripper is installed in the space above the flipping unit and the material frame placement position via a multi-axis linear module. The gripper arm can move vertically and horizontally, and its end is designed with a gripping surface adapted to the shape of the battery 2. Its movement trajectory is planned by the central controller, requiring only simple lifting, translation, and lowering to complete the picking and placing of materials, avoiding complex angle changes, thereby significantly improving the efficiency and reliability of single handling.

[0044] At the same time, such as Figure 2 As shown, multiple positioning bases 15 are detachably mounted on the flipping placement table 14 via bolts. This design allows for quick replacement of positioning bases 15 to accommodate different battery models 2, improving the flexibility of the production line. Each positioning base 15 has a placement groove 151, with a straight groove angle 1511 machined on its inner side to match the shape of the battery 2, providing initial lateral positioning for the battery 2. A suction cup port 152 is opened at the bottom of the groove, connected via a pipe to a negative pressure cylinder installed inside the flipping placement table 14. When flipping is required, the central controller issues a command to activate the negative pressure, firmly adhering the battery 2 to the positioning base 15, completely eliminating the risk of the battery 2 falling off during the flipping process.

[0045] Example 2:

[0046] Based on the above embodiments, in order to accurately determine the flipped-in state, such as Figure 4As shown, multiple photoelectric sensors are installed on the frame 11. In this embodiment, two photoelectric sensors are preferably set: the first photoelectric sensor 132 corresponds to the horizontal position, and the second photoelectric sensor 133 corresponds to the vertical position. A trigger plate 131 is fixed on the rotating shaft 13. When the flipping placement table 14 rotates to the target position, the trigger plate 131 will block the beam of the corresponding photoelectric sensor, and the sensor will then send a high-level signal to the central controller. The central controller will only allow the execution of subsequent processes after receiving the correct positioning signal, ensuring the absolute safety and accuracy of the operation.

[0047] Furthermore, to ensure the accuracy of the tilting angle of the tilting table, when the motor 12 drives the tilting and placement table 14 to rotate to the vertical material picking position, its stopping angle is slightly more than 90°, preferably 100°. This design causes the battery 2 to tilt slightly backward in the vertical position, with its center of gravity closer to the gripper side, making it easier for the gripper to extend and pick up the battery and making it easier to remove the battery, thus avoiding interference with the positioning base 15. During this process, the precise angle is confirmed by both the encoder of the motor 12 and the second photoelectric sensor 133.

[0048] Example 3:

[0049] In this embodiment, to ensure that each battery 2 is in a completely consistent position before being flipped, so that the vertical gripper can accurately grasp it and avoid scratches or bumps to the batteries 2 due to positional errors when placing them into the material box. Figure 2 As shown, below the flipping placement platform 14, a repositioning mechanism is provided for each battery 2 placement position. This mechanism includes two pushing cylinders 186 with mutually perpendicular pushing directions and their driving pushing components 18. The end of the pushing component 18 is provided with a horizontal push block 183. After the battery 2 is roughly placed into the placement groove 151, the central controller sequentially activates the two pushing cylinders 186, pushing the battery 2 so that its two adjacent sides are tightly against the straight groove angle 1511, eliminating all positional and orientation deviations. It is worth noting that the pushing component 18 itself is designed with a buffer structure, one specific structure of which is shown below. Figure 3 As shown, the device includes a buffer block 181 connected to a push cylinder 186, and a vertical push plate 182 slidably mounted in the sliding groove of the buffer block 181 via a guide pin 184. Multiple buffer springs 185 are provided between the two. A horizontal push block 183 is connected to the top of the vertical push plate 182. When the push cylinder 186 pushes, the vertical push plate 182 causes the horizontal push block 183 to contact the side wall of the battery 2. If overshoot occurs, the buffer springs 185 are compressed to absorb the impact force, achieving "soft contact" protection for the battery 2 and effectively preventing damage to the battery 2.

[0050] Furthermore, to provide deterministic feedback on the completion of precise positioning to the central controller, a positioning indication mechanism 16 is integrated on each positioning base 15. This mechanism, as... Figure 5As shown, the device includes a mounting box 161, which contains a resilient contact 162 and a stationary contact 163. The trigger end 1621 of the resilient contact 162 extends to the inner side of the straight groove angle 1511. Specifically, in this embodiment, two alignment prompting mechanisms 16 are provided, with the trigger ends 1621 of the two alignment prompting mechanisms 16 respectively positioned on the two right-angled sides inside the straight groove angle 1511. When the repositioning mechanism perfectly pushes the battery 2 into the straight groove angle 1511, the battery 2 will press the trigger end 1621, causing the resilient contact 162 to deform until it contacts the stationary contact 163, thereby conducting the circuit and generating a switching signal transmitted to the central controller. The central controller must receive the "in position" signal sent by all alignment prompting mechanisms 16 before logically interlocking to initiate the next adsorption and flipping command, thus eliminating the possibility of subsequent dangerous operations due to inaccurate positioning of individual batteries 2.

[0051] Example 4:

[0052] To ensure that battery 2 is fully positioned on positioning base 15, such as Figure 1 As shown, a set of through-beam light curtains 17 are installed on both sides of the flip-up placement platform 14. The transmitting and receiving ends of the through-beam light curtains 17 are respectively located on both sides of the flip-up placement platform 14, and the height of their beams is slightly higher than the top surface of the battery 2, preferably 0.5 mm higher. After coarse placement, if a beam is not blocked, the battery 2 is placed in place; after fine positioning, if the beam state is abnormal, it may indicate that the battery 2 is placed tilted, and the central controller can command repositioning or issue an alarm.

[0053] Meanwhile, the bottom of the flipping placement platform 14 is also equipped with multiple reflective photoelectric sensors to detect whether a battery 2 is placed on the corresponding positioning base 15.

[0054] Example 5:

[0055] Based on the above embodiments, this system also includes an airtightness testing device. The airtightness testing device includes an upper testing fixture and a lower sealing platform. The relative positions of the upper testing fixture and the lower sealing platform are controlled by a lifting unit. When the lower surface of the upper testing fixture and the upper surface of the lower sealing platform contact each other, an airtight cavity is formed between them. Multiple sets of batteries 2 are placed on the lower sealing platform. The upper testing fixture is provided with a transfer cavity connected to the airtight cavity, and the transfer cavity is connected to a testing gas pipe. Gas volatilized from battery 2 leakage enters the transfer cavity from the airtight cavity. The testing gas pipe detects the substance content of the gas in the transfer cavity to determine whether the batch of batteries 2 has leakage. After the test is completed, the batteries on the lower sealing platform are transferred to the unloading station using a transfer tool.

[0056] Because the equipment has a fixed detection time for air tightness, when multiple batteries have very small leakage, relying solely on the slight negative pressure in the detection tube may not be enough to absorb a sufficient amount of volatile leakage liquid within the specified time, thus failing to reach the preset leakage threshold and resulting in a misjudgment of air tightness.

[0057] Therefore, in this embodiment, the transfer cavity is a circular cavity, and the detection air pipe is located near the edge of the transfer cavity. A centrifugal fan is installed in the center of the transfer cavity, and the centrifugal fan and its motor 12 are mounted on the detection fixture. The height of the fan blades is adapted to the height of the transfer cavity. During airtightness testing, the rotation of the centrifugal fan allows the gas input into the transfer cavity from each battery 2 to be agitated by the fan blades and mixed and accumulated at the cavity edge. After the gas is agitated, mixed, and accumulated at the cavity edge, the detection air pipe can directly draw away the uniformly mixed gas, thereby improving the detection sensitivity of the equipment.

[0058] Example 6:

[0059] Based on the systems provided in embodiments one to four above, a preferred automated method for battery 2 flipping and unloading includes:

[0060] S1: Coarse placement: The upstream equipment places the qualified battery 2 horizontally into the positioning base 15, which is in the horizontal receiving position.

[0061] In this step, the central controller controls the motor 12 of the flipping unit to drive the flipping placement table 14 to rotate to the horizontal receiving position. The first photoelectric sensor 132, mounted on the frame 11, confirms the correct position, detecting that the battery 2 is horizontally placed on the positioning base 15. The upstream robot (i.e., the transfer tool in the front-end airtightness testing production line) horizontally places multiple qualified batteries 2 into their respective battery 2 placement positions on the flipping placement table 14. The placement groove 151 provides initial positioning for the battery 2.

[0062] S2: Precision Positioning and Confirmation: The central controller activates the repositioning mechanism to push battery 2 and reads the signal from the alignment prompt mechanism 16 in real time. When all workstations return the positioning signal and the through-beam light curtain 17 detects normal operation, proceed to the next step.

[0063] In this step, after receiving the loading completion signal, the central controller starts the repositioning mechanism. The pushing cylinder 186 of this mechanism pushes the pushing component 18, moving the battery 2 towards the fixed right-angle side of the placement groove 151, ensuring that the sidewalls of all batteries 2 are in close contact with the right-angle side, thus eliminating positional errors.

[0064] S3: Adsorption and Tilting: The central controller starts negative pressure adsorption and commands motor 12 to drive the tilting platform 14 to rotate to a slightly over-degree vertical material picking position, which is confirmed by the sensor.

[0065] In this step, the central controller activates the negative pressure system, which uses the suction cup 152 on the positioning base 15 to attach and fix the battery 2. Subsequently, the central controller drives the motor 12 to rotate the tilting platform 14 towards the vertical material handling position. When the second photoelectric sensor 133 (detecting the vertical position) on the frame 11 is triggered by the trigger piece 131 on the rotating shaft 13, the central controller determines that the tilting is in place and stops the motor 12.

[0066] S4: Gripping and Placement: The central controller instructs the vertical gripper to complete the gripping, transfer, and placement actions. After the removal is confirmed by the light curtain, the controller controls the flipping placement stage 14 to reset and start the next cycle.

[0067] In this step, after the battery is flipped into position, the central controller drives the vertical gripper to move directly above the flipping and placing platform 14. The gripper arm descends vertically, extending into the specially designed gripping notch 153 to clamp the battery 2. After the gripper sensor provides a clamping signal, the central controller immediately shuts off the negative pressure adsorption and commands the vertical gripper to lift the battery 2, move it horizontally above the material frame, and then vertically place the battery 2 into the box. After placement, the vertical gripper returns to the standby position, and the central controller drives the flipping and placing platform 14 to flip back to the horizontal receiving position, waiting for the next batch of batteries 2, thus forming a continuous automated operation cycle.

[0068] This embodiment utilizes a continuous process of "horizontal receiving → precise positioning → overall flipping → vertical placement" to process multiple batteries 2 at once using a flipping unit, and completes the stacking by performing simple translational movements with vertical grippers. This greatly improves the unloading rate and completely realizes vertical, high-density, and non-compression stacking of batteries 2 in the material frame, significantly improving loading efficiency and storage space utilization.

[0069] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A battery flipping and unloading system, characterized in that, The device includes a flipping unit and a vertical gripper. The flipping unit is located at the unloading station and is used to receive and grip multiple horizontally placed batteries, flipping them into an upright position via a rotating mechanism. The vertical gripper is located between the flipping unit and the material frame placement position, and is used to remove the vertically positioned batteries from the flipping unit and place them vertically into the material frame. The flipping unit includes a frame with a motor-driven rotating shaft horizontally mounted on it. A flipping placement platform is fixedly mounted on the rotating shaft, and a battery placement position is provided on the flipping placement platform. Multiple positioning bases are provided on the flipping placement platform, and each positioning base has a placement groove. The positioning bases are detachably mounted to the flipping placement platform, and the placement grooves form the battery placement positions. Each placement groove includes a straight groove angle adapted to the shape of the battery. The flip-and-place platform is also equipped with a repositioning mechanism, which includes two pushing members with mutually perpendicular pushing directions. The pushing members are pushed by a pushing cylinder disposed on the lower surface of the flip-and-place platform. The pushing members are used to push the battery disposed in the placement groove to abut against the right angle of the groove. The positioning base is also equipped with a positioning indication mechanism, which includes a mounting box fixed to the flip-and-place platform, and an elastic contact and a stationary contact disposed in the mounting box. The elastic contact has a trigger end that extends to the inside of a right-angle side of the right angle of the groove in the placement groove. When the side wall of the battery abuts against the right angle side under the push of the repositioning mechanism, the battery presses against the trigger end, causing the elastic contact to undergo elastic deformation and contact the stationary contact, thereby generating an electrical signal indicating that the battery has been positioned.

2. The battery flipping and unloading system according to claim 1, characterized in that, The flip-over placement platform is provided with a row of multiple battery placement positions. The flip-over placement platform includes horizontal and vertical positions. The motor drives the rotating shaft to rotate and causes the flip-over placement platform to switch between the horizontal and vertical positions.

3. The battery flipping and unloading system according to claim 2, characterized in that, The positioning base groove is provided with a suction cup opening, which is connected to a negative pressure cylinder on the flipping placement platform.

4. The battery flipping and unloading system according to claim 3, characterized in that, The positioning base is provided with a gripping notch, and the flipping placement platform is provided with a notch adapted to the gripping notch. When the flipping placement platform is in the vertical position, the opening of the gripping notch faces vertically upward, allowing the gripping arm of the vertical gripper to extend in and grip the battery.

5. The battery flipping and unloading system according to claim 1, characterized in that, The pushing component includes a vertical push plate and a buffer block connected to the pushing cylinder. A horizontal push block is provided on the top of the vertical push plate, which is used to abut against the side wall of the battery. A sliding groove is provided on the buffer block. The bottom of the vertical push plate is slidably disposed in the sliding groove through a guide pin. The sliding direction of the vertical push plate is the same as its pushing direction. A buffer spring is provided between the vertical push plate and the sliding groove.

6. The battery flipping and unloading system according to claim 2, characterized in that, The frame is provided with two vertical plates. The two ends of the rotating shaft are rotatably mounted on the two plates via bearings. A photoelectric sensor is provided on one side of the plate along the axis of the rotating shaft. A trigger plate extends radially outward from the rotating shaft. The trigger plate can rotate with the rotating shaft to two angles corresponding to the horizontal and vertical positions, respectively, and trigger the corresponding photoelectric sensor.

7. The battery flipping and unloading system according to claim 1, characterized in that, A beam-beaming light curtain is provided on the flip-top platform, with the transmitting and receiving ends of the light curtain located on both sides of the flip-top platform, respectively.

8. A battery flipping and unloading method using the system described in any one of claims 1 to 7, characterized in that... Includes the following steps: S1, rough placement, the batteries that have passed the airtightness test are horizontally placed into the positioning base in the flipping unit located at the unloading station and in a horizontal position; S2, precise positioning, the pusher pushes the battery so that the battery abuts against the straight groove corner on the positioning base; S3, adsorption and flipping: the suction cup opening generates negative pressure to adsorb the battery, and the motor drives the flipping placement platform to a vertical position. S4, clamping and placing: the vertical gripper arms extend vertically downwards into the clamping notch to clamp the battery, and the suction cup opening stops negative pressure adsorption after clamping.

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