Pressure sensor automatic calibration device and battery capacity grading formation mechanism

Abstract

The invention discloses a pressure sensor automatic calibration device and a battery capacity grading formation mechanism, the calibration device comprises a bearing tray, an air inlet nozzle, an air outlet nozzle and a standard barometer are arranged in the bearing tray, the air inlet nozzle is connected with the standard barometer through a first pipeline, and the air outlet nozzle is connected with the standard barometer through a second pipeline; when the bearing tray is located in the battery capacity grading formation mechanism, the air inlet nozzle and the air outlet nozzle abut against corresponding air path connectors of a negative pressure mechanism in the battery capacity grading formation mechanism respectively. The calibration device further comprises a controller, the controller is electrically connected with the standard barometer and the pressure sensor, and the controller is used for calibrating the pressure sensor according to the difference of detection values of the standard barometer and the pressure sensor. According to the automatic calibration device for the pressure sensor, the gas circuit can be connected in situ without dismounting the pressure sensor, equipment operation does not need to be interrupted in the calibration process, the production downtime is shortened, and the continuity of a battery capacity grading formation process is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of calibration tooling, and in particular to an automatic calibration device for a pressure sensor and a battery capacity division and formation mechanism. Background Art

[0002] During the battery production process, the battery needs to be divided into different capacities and formed. In the process, the battery is placed in a restraint tray, and then the restraint tray is placed in the divided capacity forming machine, and the battery in the restraint tray is charged and discharged by the divided capacity forming machine.

[0003] During the volumetric formation process, the volumetric formation mechanism needs to use pressure sensors to monitor the changes in internal air pressure during battery charging and discharging in real time to ensure process stability and battery safety. However, pressure sensors are easily affected by factors such as ambient temperature and mechanical vibration during long-term use, causing the detection value to drift, and regular calibration is required to maintain accuracy.

[0004] At present, the calibration of the pressure sensor in the volumetric formation mechanism usually requires the sensor to be removed from the equipment and connected to an external standard air pressure source and a detection instrument for manual calibration. This method has the following defects:

[0005] Need to stop the machine: The disassembly and reinstallation process causes the equipment to stop for a long time, affecting the production continuity;

[0006] Complex operation: Manual calibration relies on operator experience, which is prone to human error, and the calibration steps are cumbersome and time-consuming;

[0007] Unable to monitor online: Traditional calibration devices cannot be integrated with the volumetric formation mechanism, making it difficult to detect sensor abnormalities in a timely manner, resulting in a passive extension of the calibration cycle and affecting product quality.

[0008] In addition, although some existing calibration devices attempt to perform in-situ calibration through external gas lines, the equipment structure needs to be modified, the adaptability is poor, and there is a lack of automated data comparison and feedback mechanisms. The calibration accuracy and efficiency are still not ideal. Summary of the invention

[0009] The object of the present invention is to provide a pressure sensor calibration device which can be quickly connected to a volume separation formation mechanism and supports online automatic calibration.

[0010] In order to achieve the above-mentioned object, the present invention provides a pressure sensor automatic calibration device, which is used to calibrate the pressure sensor in a battery capacity division formation mechanism, wherein the calibration device comprises a carrying tray, the carrying tray can be docked with the restraint tray placement position in the battery capacity division formation mechanism, an air inlet nozzle, an air outlet nozzle and a standard air pressure gauge are arranged in the carrying tray, the air inlet nozzle is connected to the standard air pressure gauge through a first pipe, and the air outlet nozzle is connected to the standard air pressure gauge through a second pipe; when the carrying tray is located in the battery capacity division formation mechanism, the air inlet nozzle and the air outlet nozzle are respectively abutted with the corresponding air path interfaces of the negative pressure mechanism in the battery capacity division formation mechanism;

[0011] The calibration device also includes a controller, which is electrically connected to the standard barometer and the pressure sensor, and is used to calibrate the pressure sensor according to the difference between the detection values ​​of the standard barometer and the pressure sensor.

[0012] Preferably, a first bracket and a second bracket extending upward from the bottom wall are provided in the carrying tray, the air inlet nozzle is provided at the top end of the first bracket, and the air outlet nozzle is provided at the top end of the second bracket.

[0013] Preferably, a first magnetic base is provided on the top of the first bracket, the air inlet nozzle is provided on the first base, a second magnetic base is provided on the top of the second bracket, and the air outlet nozzle is provided on the second base; when the carrying tray is located on the battery capacity division and formation mechanism, the first base and the second base are magnetically attracted together with the corresponding air path interfaces on the battery capacity division and formation mechanism.

[0014] Preferably, a driving power supply electrically connected to the standard barometer is also provided in the carrying tray.

[0015] Preferably, a groove is further provided on the bottom wall of the outer side of the carrying tray, a conductive column is provided in the groove, the top end of the conductive column passes through the bottom wall of the carrying tray and is located in the carrying tray, and the top end of the conductive column is electrically connected to the driving power supply; when the carrying tray is located on the battery capacity division and formation mechanism, the portion of the conductive column located in the groove is connected to a power interface provided on the battery capacity division and formation mechanism.

[0016] Preferably, a pneumatic proportional valve is also connected in series in the first pipeline.

[0017] Preferably, the controller also determines the validity of current detection data by the air pressure rising rate detected by the standard barometer.

[0018] Preferably, a plurality of positioning parts are further provided on the peripheral side of the bottom wall of the carrying tray, and based on the positioning parts, the carrying tray can be fixed at a corresponding position of the battery capacity dividing and forming mechanism.

[0019] The present invention also provides a battery capacity division formation mechanism, which includes an upper frame and a lower frame arranged relatively to each other, wherein the lower frame is used to place a restraint tray or the pressure sensor automatic calibration device as described above, and the upper frame is provided with a charging and discharging mechanism and a negative pressure mechanism, wherein the negative pressure mechanism is provided with a pressure sensor.

[0020] Compared with the prior art, the automatic calibration device for pressure sensors provided by the above technical solution of the present invention is designed to directly connect the carrying tray with the restraint tray placement position of the battery capacity division formation mechanism, so that the calibration device can be connected to the gas path in situ without removing the pressure sensor, and the calibration process does not need to interrupt the operation of the equipment, thereby reducing production downtime and ensuring the continuity of the battery capacity division formation process; in addition, the controller collects the detection values ​​of the standard pressure gauge (reference value) and the pressure sensor to be calibrated in real time, automatically compares the differences and completes the calibration parameter correction, thereby reducing manual operation links, avoiding calibration deviations caused by manual recording and calculation, and significantly improving calibration efficiency and consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural diagram of the battery capacity division and formation mechanism in an embodiment of the present invention.

[0022] Figure 2 for Figure 1 Front view of.

[0023] Figure 3 It is a three-dimensional structural diagram of the automatic calibration device for a pressure sensor in an embodiment of the present invention at one viewing angle.

[0024] Figure 4 It is a three-dimensional structural diagram of the automatic calibration device for a pressure sensor in an embodiment of the present invention from another perspective. DETAILED DESCRIPTION

[0025] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the implementation methods and the accompanying drawings.

[0026] like Figures 1 to 3 This embodiment discloses a pressure sensor automatic calibration device 2, which is used to calibrate a pressure sensor (not shown) in a battery capacity formation mechanism 100. In the battery capacity formation mechanism 100, the negative pressure value inside the battery is monitored in real time by a pressure sensor, and the accuracy requirement is high. Therefore, it is necessary to ensure the accuracy of the pressure sensor.

[0027] The calibration device 2 includes a carrier tray 20, which can be docked with a restraint tray placement position in the battery capacity separation and formation mechanism 100 (eg, Figure 1 and Figure 2 ).

[0028] An air inlet nozzle 210 , an air outlet nozzle 220 and a standard air pressure gauge 23 are disposed in the carrying tray 20 .

[0029] The air inlet nozzle 210 is connected to the standard air pressure gauge 23 through a first pipe 211 , and the air outlet nozzle 220 is connected to the standard air pressure gauge 23 through a second pipe 221 .

[0030] When the carrying tray 20 is located in the battery capacity separation and formation mechanism 100 , the air inlet nozzle 210 and the air outlet nozzle 220 are respectively in contact with corresponding air path interfaces of the negative pressure mechanism 13 in the battery capacity separation and formation mechanism 100 .

[0031] The calibration device 2 further includes a controller, which is electrically connected to the standard barometer 23 and the pressure sensor. The controller is used to calibrate the pressure sensor according to the difference between the detection values ​​of the standard barometer 23 and the pressure sensor.

[0032] When the calibration device 2 is used to calibrate the pressure sensor in the battery capacity division formation mechanism 100, the carrier tray 20 is first placed in the position where the restraint tray is placed in the battery capacity division formation mechanism 100. At this time, the air inlet nozzle 210 and the air outlet nozzle 220 are in contact with the corresponding air path interface of the negative pressure mechanism 13 in the battery capacity division formation mechanism 100. Then, the same negative pressure as that in the negative pressure mechanism 13 is generated in the first pipe 211 and the second pipe 221, and the negative pressure value is detected by the standard barometer 23. The controller performs differential calculation on the reference value fed back by the standard barometer 23 and the detection value of the pressure sensor in the negative pressure mechanism 13, and calibrates the pressure sensor according to the calculation result.

[0033] It should be noted that during the calibration process, the controller can gradually adjust the air pressure according to the preset calibration points (such as 0%, 25%, 50%, 75%, 100% range). The dwell time at each calibration point is ≥ 3 seconds to ensure that the air pressure is stable. The standard air pressure value and pressure sensor output value of each calibration point are recorded to generate a calibration curve.

[0034] For the calibration device 2, firstly, the carrying tray 20 is designed to be directly connected to the restraint tray placement position of the battery capacity separation and formation mechanism 100, so that the calibration device 2 can be connected to the gas path in situ without removing the pressure sensor, and the calibration process does not need to interrupt the operation of the equipment, thereby reducing production downtime and ensuring the continuity of the battery capacity separation and formation process.

[0035] Secondly, the controller collects the detection values ​​of the standard barometer 23 (reference value) and the pressure sensor to be calibrated in real time, automatically compares the differences and completes the calibration parameter correction, thereby reducing manual operation links, avoiding calibration deviations caused by manual recording and calculation, and significantly improving calibration efficiency and consistency.

[0036] Furthermore, the carrier tray 20 has an inlet nozzle 210, an outlet nozzle 220 and a standard pressure gauge 23 built therein, and a closed-loop gas circuit is formed through the first pipe 211 and the second pipe 221, which is physically connected to the gas circuit interface of the battery capacity separation and formation mechanism. Therefore, there is no need to modify the gas circuit structure of the existing battery capacity separation and formation mechanism 100, and it is plug-and-play, adaptable to different types of battery capacity separation and formation mechanisms, and reduces the equipment modification cost.

[0037] In addition, the standard barometer 23 is directly connected to the gas circuit system to be tested, and synchronously detects the same air pressure source as the pressure sensor, eliminating the additional error introduced by the traditional external air source. Therefore, the calibration reference is completely consistent with the actual working environment of the sensor, avoiding loss interference during the air pressure transmission process, and ensuring that the calibration result truly reflects the sensor status.

[0038] In general, the calibration device 2 solves the problems of equipment downtime, manual dependence, and poor adaptability in traditional calibration methods through mechanical structure adaptation, gas circuit closed-loop integration, and automated calibration calculations, and achieves efficient in-situ calibration of the pressure sensor while ensuring the stability of the battery capacity formation process and the product yield.

[0039] On the other hand, the carrier tray 20 is provided with a first bracket 212 and a second bracket 222 extending upward from the bottom wall, the air inlet nozzle 210 is provided at the top of the first bracket 212, and the air outlet nozzle 220 is provided at the top of the second bracket 222. Through the arrangement of the first bracket 212 and the second bracket 222, the air inlet nozzle 210 and the air outlet nozzle 220 can directly abut against the corresponding air path interface of the negative pressure mechanism 13 in the battery capacity division and formation mechanism 100, without the need to configure a related connecting air path in the middle, which is convenient to use.

[0040] In addition, a first base 213 having magnetic properties is disposed on the top of the first bracket 212, and the air inlet nozzle 210 is disposed on the first base 213. A second base 223 having magnetic properties is disposed on the top of the second bracket 222, and the air outlet nozzle 220 is disposed on the second base 223. When the carrying tray 20 is located on the battery capacity division and formation mechanism 100, the first base 213 and the second base 223 are magnetically attracted to the corresponding air path interfaces on the battery capacity division and formation mechanism 100.

[0041] In this embodiment, by disposing the first magnetic base 213 and the second magnetic base 223, the air inlet nozzle 210 and the air outlet nozzle 220 are automatically connected to the air path mechanism of the corresponding negative pressure mechanism 13, and the air tightness is good.

[0042] On the other hand, a driving power source 24 electrically connected to the standard barometer 23 is also disposed in the carrying tray 20 , and the driving power source 24 provides power supply to the standard barometer 23 .

[0043] Furthermore, if Figure 4 A groove 25 is further provided on the bottom wall of the outer side of the carrying tray 20, and a conductive column 26 is provided in the groove 25. The top of the conductive column 26 passes through the bottom wall of the carrying tray 20 and is located in the carrying tray 20, and the top of the conductive column 26 is electrically connected to the driving power source 24. When the carrying tray 20 is located on the battery capacity division formation mechanism 100, the portion of the conductive column 26 located in the groove 25 is connected to the power interface provided on the battery capacity division formation mechanism 100.

[0044] When the carrier tray 20 is mounted on the battery capacity division and formation mechanism 100, the conductive column 26 in the groove 25 is connected to the corresponding power output port on the battery capacity division and formation mechanism 100, so that the driving power supply 24 starts to work to output the driving current to the standard barometer 23. In this way, no external power supply is required, the use is convenient, and the level of automated operation is improved.

[0045] On the other hand, a pressure proportional valve may be connected in series in the first pipeline 211 to ensure the stability of the negative pressure value in the first pipeline 211 and the second pipeline 221 to avoid large errors caused by unstable air pressure.

[0046] On the other hand, the controller also determines the validity of the current detection data through the pressure rise rate detected by the standard barometer 23. When the pressure rise rate is abnormal, it is possible that the current gas path is blocked. If the calibration is performed based on this data, it will be inaccurate. Therefore, the effective detection value is screened by the pressure rise rate to ensure the accuracy of the calibration.

[0047] On the other hand, Figure 4 A plurality of positioning portions 27 are further provided on the peripheral side of the bottom wall of the carrying tray 20 . Based on the positioning portions 27 , the carrying tray 20 can be fixed at a corresponding position of the battery capacity division and formation mechanism 100 .

[0048] In this embodiment, the carrier tray 20 can be fixed at a corresponding position of the battery capacity division and formation mechanism 100 by means of four positioning portions 27 disposed around the bottom wall of the carrier tray 20 .

[0049] Specifically, the positioning portion 27 is a positioning hole, which is interference-fitted with a positioning pin on the volume separation forming mechanism.

[0050] In another preferred embodiment of the present invention, a battery capacity division formation mechanism 100 is also disclosed, including an upper frame 10 and a lower frame 11 that are relatively arranged, the lower frame 11 is used to place a restraint tray or the pressure sensor automatic calibration device 2 in the above embodiment, and the upper frame 10 is provided with a charging and discharging mechanism 12 and a negative pressure mechanism 13, and the negative pressure mechanism 13 is provided with a pressure sensor.

[0051] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A pressure sensor automatic calibration device, used for calibrating the pressure sensor in the battery capacity formation mechanism, characterized in that: The calibration device comprises a carrying tray, the carrying tray can be docked with the restraint tray placement position in the battery capacity division formation mechanism, an air inlet nozzle, an air outlet nozzle and a standard air pressure gauge are arranged in the carrying tray, the air inlet nozzle is connected to the standard air pressure gauge through a first pipe, and the air outlet nozzle is connected to the standard air pressure gauge through a second pipe; when the carrying tray is located in the battery capacity division formation mechanism, the air inlet nozzle and the air outlet nozzle are respectively abutted with the corresponding air path interfaces of the negative pressure mechanism in the battery capacity division formation mechanism; The calibration device also includes a controller, which is electrically connected to the standard barometer and the pressure sensor, and is used to calibrate the pressure sensor according to the difference between the detection values ​​of the standard barometer and the pressure sensor.

2. The automatic calibration device for pressure sensor according to claim 1, characterized in that: The carrying tray is provided with a first bracket and a second bracket extending upward from the bottom wall, the air inlet nozzle is provided at the top end of the first bracket, and the air outlet nozzle is provided at the top end of the second bracket.

3. The automatic calibration device for pressure sensor according to claim 2, characterized in that: A first magnetic base is arranged on the top of the first bracket, and the air inlet nozzle is arranged on the first base; a second magnetic base is arranged on the top of the second bracket, and the air outlet nozzle is arranged on the second base; when the carrying tray is located on the battery capacity division and formation mechanism, the first base and the second base are magnetically attracted together with the corresponding air path interfaces on the battery capacity division and formation mechanism.

4. The automatic calibration device for pressure sensor according to claim 1, characterized in that: A driving power source electrically connected to the standard barometer is also provided in the carrying tray.

5. The automatic calibration device for pressure sensor according to claim 4, characterized in that: A groove is also provided on the bottom wall of the outer side of the carrying tray, a conductive column is provided in the groove, the top end of the conductive column passes through the bottom wall of the carrying tray and is located in the carrying tray, and the top end of the conductive column is electrically connected to the driving power supply; when the carrying tray is located on the battery capacity division and formation mechanism, the part of the conductive column located in the groove is connected to the power interface provided on the battery capacity division and formation mechanism.

6. The automatic calibration device for pressure sensor according to claim 1, characterized in that: A pneumatic proportional valve is also connected in series in the first pipeline.

7. The automatic calibration device for a pressure sensor according to claim 1, characterized in that: The controller also determines the validity of current detection data through the air pressure rising rate detected by the standard barometer.

8. The automatic calibration device for a pressure sensor according to claim 1, characterized in that: A plurality of positioning parts are also provided on the peripheral side of the bottom wall of the carrying tray, and based on the positioning parts, the carrying tray can be fixed at the corresponding position of the battery capacity dividing and forming mechanism.

9. A battery capacity division and formation mechanism, characterized in that: It comprises an upper frame and a lower frame arranged relatively to each other, the lower frame is used to place a restraint tray or the pressure sensor automatic calibration device as described in any one of claims 1 to 8, the upper frame is provided with a charging and discharging mechanism and a negative pressure mechanism, and the negative pressure mechanism is provided with a pressure sensor.

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