Square lithium battery cell constant voltage measuring thickness device
The utility model relates to lithium battery production technical field, particularly relates to a kind of square lithium battery cell constant voltage measuring thickness device.
In Production Process of Lithium Battery, according to the requirement of related process, need to measure to carry out stepping to the thickness of lithium battery electric core.In traditional technique, mostly the measurement of lithium battery electric core thickness is by comparatively accurate survey instruments such as slide calliper rule, yet, more by the uncertain factor that the mode of kind of calliper is artificial, during measurement, the clamping force of lithium battery electric core is difficult to keep constant, difference between different operating person also can cause different impacts to measurement result, in addition, due to lithium battery electric core surface thickness skewness often, in order to measure the thickest position dimension of lithium battery electric core, often need to carry out multi-point sampler, even under these circumstances, the situation that can not record the thickest position of lithium battery electric core thickness also happens occasionally.
In order to address the above problem, notification number is that the Chinese patent of CN201016701Y discloses a kind of device of measuring cell thickness, this device comprises operating part, operating part comprises a datum plate, a support column and is located at the cantilever of support column upper end, on support column, be equipped with cylinder, cylinder is connected with control box, flow speed control valve, foot valve and pneumatic triple piece in turn.Cylinder top is fixed with check-out console, bottom is fixed with lower check-out console, between cylinder and cantilever, is provided with sensor, and sensor input end is connected with micro actuator, output terminal is connected with hummer and alarm lamp, and datum plate is provided with go-no go gauge.During measurement, first step on foot valve, cylinder drives lower check-out console to rise, then tested battery is put on datum plate, after lifting foot valve, cylinder drives lower check-out console decline and lower check-out console is pressed on tested battery, when the height of tested battery is during greater than or equal to the height of go-no go gauge, alarm lamp lights, while buzzer warning, tested battery is defective, otherwise, when the height of tested battery is during lower than the not-go-end of go-no go gauge, electrical measurement battery detecting is qualified.Before measurement, can regulate by micro actuator the working pressure of sensor.
Known by above description, said apparatus is to take cylinder as driving, sensor and datum plate lay respectively at the place, two ends of drive unit, and when test, between cylinder and sensor, also has relative displacement, in such cases, very easily because sandwich foreign material between sensor and cylinder, cause measuring error, in addition, at cylinder repeatedly after movable certain number of times, collision between sensor and cylinder when contacting also can cause the damage of sensor, and therefore, said apparatus exists poor reliability and the flimsy problem of sensor.In addition, because being adopts treadle control mode, so the measurement inefficiency of said apparatus; The adjusting of micro actuator is to regulate artificially, and this has also affected the testing efficiency to battery; , with go-no go gauge, detect, whether thickness that only can the tested battery of detection place is qualified meanwhile, and it can not record the margin of error of tested battery, the debugging of battery production equipment brought to inconvenience to the later stage.
Summary of the invention
The purpose of this utility model is to provide a kind of square lithium battery cell constant voltage measuring thickness device, the poor reliability and the flimsy problem of sensor that to solve current measuring thickness device, exist.
In order to address the above problem, square lithium battery cell constant voltage measuring thickness device of the present utility model is by the following technical solutions: square lithium battery cell constant voltage measuring thickness device, this device comprises drive unit and device for pressure measurement, described drive unit is connected with output push rod, and device for pressure measurement is connected between drive unit and output push rod.
Described drive unit is connected with output push rod by a slide block, and slide block is assemblied on a guide pillar along the activity direction guiding of output push rod.
Described drive unit is servomotor, and drive unit is connected with device for pressure measurement by screw-nut mechanism.
This device also comprises master controller and the man-machine interface being connected with master controller, drive unit is connected with master controller respectively with device for pressure measurement, is provided with for control the pressure control hardware module of the output pressure value of operating part by reciprocating drive unit according to the signal of man-machine interface in master controller.
In master controller, be also provided with while reaching setting value for the value at device for pressure measurement and order about and export the action control hardware module that push rod returns.
This device also comprise be connected with master controller, for according to the automatic detection device of the whether online signal controlling drive unit of tested battery action.
This device also comprises the measurer for thickness for detection of tested cell thickness.
One end away from device for pressure measurement of described output push rod is provided with push pedal, and described measurer for thickness and push pedal are oppositely arranged.
Because the drive unit of this constant voltage measuring thickness device is connected with output push rod, and device for pressure measurement is connected between drive unit and output push rod, therefore, in the process of measuring, device for pressure measurement links together with output push rod and drive unit all the time, between three, both generations of collisionless action, can not be subject to again the impact of external impurities, thereby have solved poor reliability and the flimsy problem of sensor that current measuring thickness device exists.
Further, slide block and guide pillar have further guaranteed the press direction of push rod, can contribute to improve the precision that tested cell thickness is detected; The type of drive that servomotor adds screw-nut mechanism than surge or pneumatic mode more can guarantee precision; Man-machine interface and master controller can be realized fast, precisely controlling push rod pressure and action; Automatic detection device is combined with master controller and man-machine interface and can be realized this and install further robotization, only needs the artificial mesuring battary that participates in putting and taking; Measurer for thickness can directly record the actual (real) thickness of tested battery battery core, for the follow-up debugging to battery production equipment provides support.
Accompanying drawing explanation
Fig. 1 is the system chart of the embodiment of square lithium battery cell constant voltage measuring thickness device;
Fig. 2 is the control system block diagram of the embodiment of square lithium battery cell constant voltage measuring thickness device;
Fig. 3 is the structural representation of embodiment of the topworks of square lithium battery cell constant voltage measuring thickness device.
The embodiment of square lithium battery cell constant voltage measuring thickness device, as Figure 1-3, this device comprises man-machine interaction unit 101(man-machine interface, HMI), information acquisition unit, information processing and controlling unit, servo-control system and movement executing mechanism.In the present embodiment, information processing and controlling unit adopts master controller (PLC) 102, in master controller, be provided with pressure control hardware module and action control hardware module, information acquisition unit comprises a device for pressure measurement 11 and a measurer for thickness 12, device for pressure measurement 11 adopts pressure sensors, what measurer for thickness 12 specifically adopted is infrared distance sensor.What servo-control system adopted is servomotor 13 and corresponding component thereof, and movement executing mechanism is output push rod 14.
Servomotor 13 is fixedly assemblied on a testing jig and as the drive unit of this measuring thickness device, uses simultaneously, it is connected with a slide block 15 by screw-nut mechanism, slide block 15 leads along the vertical direction and is assemblied on the guide pillar 16 of testing jig, push rod 14 is can be a vertically movable push rod and in lower end, is equipped with a push pedal 17, push pedal 17 is leveling board, device for pressure measurement 11 is connected between push rod 14 and slide block 15, on testing jig, below push pedal 17, locate to be provided with for placing the tested battery core rest area 18 of tested battery battery core, measurer for thickness 12 is located at a side place of tested battery core rest area 18, itself and push pedal 17 are in conjunction with can recording the thickness of tested battery battery core and sending data to master controller, master controller further also shows this data transmission to man-machine interaction unit.
When using this measuring thickness device to carry out thickness measure to lithium battery electric core, can first pass through the required force value of man-machine interaction unit input test, the parameter values such as the thickness bound of tested battery battery core and servomotor movement velocity, by man-machine interaction unit, control parameter setting, the control signal that setting draws is passed in master controller, pressure control module and the action control module of master controller work simultaneously and start servomotor, push rod moves and pushes tested battery battery core under the effect of servomotor, device for pressure measurement by pressure signal transmission to master controller, when the pressure pressing down when push rod reaches setting value, whether the thickness that just can learn tested battery battery core is qualified, measurer for thickness draws the actual (real) thickness of tested battery battery core simultaneously, it is to be noted herein, in the present embodiment, this measuring thickness device also comprises warning part, if battery battery core thickness is defective, alarm directly sends signal.
In addition, in the present embodiment, also arrange be connected with master controller, the automatic detection device for moving according to the whether online signal controlling drive unit of tested battery battery core, whether online automatic detection device can gather push rod initial point signal, limit signal, the tested battery battery core external signal such as detection, can be combined with master controller and man-machine interface and can realize this and install further robotization, only need the artificial mesuring battary battery core that participates in putting and taking.