CN209432096U - A high-precision thickness measuring device for a small square lithium battery - Google Patents

Abstract

The utility model discloses a high-precision thickness measuring device for small square lithium batteries, including a body, a thickness measuring displacement sensor installed on the body, a lifting platform installed below the thickness measuring displacement sensor, and the lifting platform connected to a lifting servo motor; an upper pressing plate and a lower pressing plate are installed above and below the lifting platform; the thickness measuring displacement sensor is located directly above the upper pressing plate; a pressure detector is provided in the lifting platform, and the pressure detector is connected to the lower pressing plate. The utility model adopts a linear module to realize reciprocating motion, uses a servo motor to accurately drive positioning, uses a pressure detector to determine that effective contact with the lithium battery is achieved, and then realizes the thickness measurement of the product through the thickness measuring displacement sensor, which is very beneficial to the thickness measurement process of small square lithium batteries, and can not only achieve extremely high measurement accuracy, but also improve production efficiency; at the same time, the structure of the equipment is small and exquisite, and the cost performance is high, which can greatly reduce the cost of lithium battery enterprises, thereby improving the acceptance of manufacturers.

Description

A high-precision thickness measuring device for a small square lithium battery

technical field

The utility model relates to the technical field of industrial testing equipment, in particular to a testing equipment for small square lithium batteries.

Background technique

Before the lithium battery finally enters the market, the battery voltage and internal resistance need to be tested to ensure that the battery voltage flowing into the user is qualified. Due to the characteristics of lithium batteries, the voltage of lithium batteries will gradually decrease over time. Due to the defects in the production process of some batteries, the voltage drop speed will be accelerated, which will affect the use of users. As the requirements for product quality are getting higher and higher, in some terminal products with high use environment, the voltage of lithium batteries is required to be kept higher than the conventional standard, and the voltage of lithium batteries is required to be maintained within a certain period of time. within certain standards. Therefore, it is necessary to screen out batteries that have defects in the production process and the voltage drops too fast (generally referred to as K value in the industry); in addition, after the final charging of the battery cell, the internal reaction occurs, and some types of small lithium batteries are due to the existence of Bad batteries will bulge inside. If they are not screened in time, there will be safety hazards. Therefore, some small lithium batteries have extremely high testing standards for thickness. In the current traditional technology, the thickness measuring equipment basically adopts cylinder positioning and displacement sensor to measure the thickness. Manual detection is very inefficient and difficult to control the quality. There is no more mature method for accurate detection of battery thickness. For some customers with high requirements, traditional methods and equipment can no longer meet their technological requirements.

Utility model content

Aiming at the shortcomings of the prior art, the utility model provides a servo motor drive, precise control through high-precision displacement sensors and pressure detectors, exquisite equipment, simple structure, low cost, and suitable for most battery manufacturers. High-precision thickness measuring device for small square lithium battery.

In order to solve the above technical problems, the utility model adopts the following technical scheme: a small square lithium battery high-precision thickness measuring device, including a fuselage, a control system and a power supply mechanism, characterized in that: the fuselage is installed on an X-axis A structure capable of horizontal traversing is formed on the mechanism, and the X-axis mechanism is equipped with a traversing servo motor to form a driving mechanism for the horizontal traversing of the fuselage; a fixed-position thickness measuring displacement sensor and a lifting servo motor are installed on the fuselage. A lifting platform that can move up and down is installed under the thick displacement sensor. The lifting platform is installed on the fuselage and connected with the lifting servo motor; the lower pressing plate is installed under the lifting platform, and the upper pressing plate is installed above the lifting platform. The upper pressing plate and the lower pressing plate The upper and lower horizontal relative structures of the lifting platform are formed, and the upper platen and the lower platen are connected to form a structure that can move synchronously with the lifting platform; the thickness measuring displacement sensor is located directly above the upper platen; a pressure detector is installed in the lifting platform, and the pressure detection The device is connected with the lower pressing plate to form a detection mechanism for the pressure when the lower pressing plate presses the lithium battery.

Further, the lifting platform includes a lifting base and a mounting plate, the lifting base is installed on the vertical lifting guide rail located on the facade of the fuselage, the mounting plate is horizontally fixed on the lifting base and protrudes forward; the upper pressing plate is located on the mounting plate Above, the lower pressure plate is located under the mounting plate, and the pressure detector passes through the mounting plate to connect with the lower pressure plate.

Further, the upper pressing plate and the lower pressing plate are connected to form a synchronous structure through the pressing plate guide post, and an oil-free bushing is provided at the position where the guide post passes through the mounting plate, and the oil-free bushing forms a high gap between the upper pressing plate and the lower pressing plate. Precision-oriented structure.

Further, the upper platen and the lower platen are respectively provided with two pieces, which are arranged side by side above and below the mounting plate, and two thickness measuring displacement sensors are also provided, respectively corresponding to the two upper platens, so that two pieces can be measured at the same time. The thickness of the lithium battery.

Furthermore, the lifting servo motor is connected to the lifting seat through a combination of grinding-grade screw rods to form a high-precision lifting drive structure for the lifting platform, so that the upper and lower pressing plates have extremely high lifting and positioning accuracy.

Further, two fixed arms protruding forward are arranged on the top of the fuselage, and the thickness measuring displacement sensor is installed upright on the side of the fixed arms.

Preferably, the pressure detector is a high-precision circular pressure detector, which is docked with the center of the lower platen.

Further, a 00-grade marble positioning platform for placing square lithium batteries is also provided. The marble positioning platform is horizontally arranged in front of the X-axis mechanism and is located in the downward direction of the lower pressing plate. The lithium battery is placed on the marble positioning platform.

When working, four small square lithium batteries are neatly placed on the marble positioning platform, and the machine body is driven by a traverse servo motor to move along the X-axis mechanism to directly above the lithium batteries. Driven by the lifting servo motor, the screw combination drives the mounting plate to move up and down in a straight line repeatedly along the lifting guide rail, so that the lower pressing plate touches the surface of the lithium battery. Under the guidance of the oil-free bushing, two ultra-flat lower pressure plates press the surfaces of the two lithium batteries, and the circular high-precision pressure detector will accurately detect the pressure value. If the detected pressure value reaches the set range, the computer system controls the lifting servo motor to stop working. At this time, the two thickness measuring displacement sensors on the left and right measure the moving distance of the upper platen to detect the thickness of the lithium battery product, and the subsequent station automatically selects qualified battery products and automatically flows into the next process.

The utility model adopts the linear module to realize the reciprocating motion, uses the servo motor to accurately drive the positioning, uses the pressure detector to determine the effective contact with the lithium battery, and then realizes the thickness measurement of the product through the thickness measuring displacement sensor, which is very beneficial to the small square lithium battery The advanced thickness measurement process can not only achieve extremely high measurement accuracy, but also improve production efficiency; at the same time, the structure of the equipment is small and exquisite, and the cost performance is high, which can greatly reduce the cost of lithium battery enterprises, improve the acceptance of manufacturers, and reduce the need for front-line personnel. The degree of dependence and the qualification rate and quality of battery products are improved, which is conducive to popularization and application.

Description of drawings

Fig. 1 is the three-dimensional exterior view of the utility model;

Fig. 2 is the front schematic view of the utility model;

Fig. 3 is a structural diagram of the main part of the utility model;

Figure 4 is a schematic diagram of the assembly of the pressure detector.

In the figure, 1 is the fuselage, 2 is the X-axis mechanism, 3 is the lifting seat, 4 is the mounting plate, 5 is the lower platen, 6 is the upper platen, 7 is the thickness measuring displacement sensor, 8 is the fixed arm, and 9 is the lifting servo Motor, 10 is a pressure detector, 11 is a traverse servo motor, 12 is a lifting guide rail, 13 is a pressing plate guide post, 14 is an oil-free bushing, 16 is a marble positioning platform, and 17 is a lithium battery.

Detailed ways

In this embodiment, referring to Fig. 1-Fig. 4, the high-precision thickness measuring device for a small square lithium battery includes a body 1, a control system and a power supply mechanism, and the body 1 is installed on an X-axis mechanism 2 to form a The structure can move horizontally. The X-axis mechanism 2 is equipped with a traverse servo motor 11 to form a driving mechanism for horizontally moving the fuselage 1; a thickness measuring displacement sensor 7 and a lifting servo motor 9 are installed on the fuselage 1. , a lifting platform that can move up and down is installed below the thickness measuring displacement sensor 7, and the lifting platform is installed on the fuselage 1 and connected with the lifting servo motor 9; Pressing plate 6, upper pressing plate 6 and lower pressing plate 5 form the up and down horizontal relative structure that separates lifting platform, and upper pressing plate 6 and lower pressing plate 5 are connected into the structure that can move synchronously with lifting platform; Above: a pressure detector 10 is arranged in the lifting platform, and the pressure detector 10 is connected with the lower pressing plate 5 to form a detection mechanism for the pressure on the lower pressing plate 5 when the lithium battery 17 is pressed, by detecting the pressure of the lower pressing plate 5 to Confirm whether the lower pressing plate 5 is in effective contact with the lithium battery 17.

The lifting platform includes a lifting base 3 and a mounting plate 4, the lifting base 3 is installed on the vertical lifting guide rail 12 positioned on the facade of the fuselage 1, and the mounting plate 4 is horizontally fixed on the lifting base 3 and protrudes forward; 6 is located above the mounting plate 4 , the lower pressing plate 5 is located below the installing plate 4 , and the pressure detector 10 passes through the mounting plate 4 and connects with the lower pressing plate 5 .

The upper platen 6 and the lower platen 5 are connected to form a synchronous structure through the platen guide post 13. The position where the guide post 13 passes through the mounting plate 4 is provided with an oil-free bushing 14, and the oil-free bushing 14 forms a pair of upper platen 5. And the high-precision guiding structure of the lower pressing plate 5.

The upper platen 6 and the lower platen 5 are respectively provided with two pieces, which are arranged side by side above and below the mounting plate 4, and the thickness measuring displacement sensor 7 is also provided with two, respectively corresponding to the two upper platen 6, so that it can be measured at the same time The thickness of two lithium batteries 17.

The lifting servo motor 7 is connected to the lifting seat 3 through a combination of grinding-grade screw rods to form a high-precision lifting drive structure for the lifting platform, so that the upper platen 6 and the lower platen 5 have extremely high lifting and positioning accuracy.

Two fixed arms 8 protruding forward are arranged on the top of the fuselage 1 , and the thickness measuring displacement sensor 7 is installed upright on the side of the fixed arms 8 .

The pressure detector 7 is a high-precision circular pressure detector, which is docked with the center of the lower platen 6 .

A 00-grade marble positioning platform 16 for placing a square lithium battery 17 is also provided. The marble positioning platform 16 is horizontally arranged in front of the X-axis mechanism 2, and is located in the lower direction of the lower pressing plate 5. The lithium battery 17 is placed on the marble positioning platform. 16 on.

During work, four small square lithium batteries 17 are neatly placed on the marble positioning platform 16, and the body 1 is driven by the traverse servo motor 11 to move directly above the lithium batteries 17 along the X-axis mechanism 2. Driven by the lifting servo motor 9, the mounting plate 4 is driven to move up and down along the lifting guide rail 12 through the combination of screw rods, so that the lower pressing plate 5 contacts the surface of the lithium battery 17. Under the guidance of the oil-free bushing 14, two ultra-flat lower pressure plates 5 press the surfaces of the two lithium batteries 17, and the circular high-precision pressure detector 10 will accurately detect the pressure value. If the detected pressure When the value reaches the set range, the computer system controls the lifting servo motor 9 to stop working. At this time, the left and right thickness-measuring displacement sensors 7 measure the moving distance of the upper platen 6 to detect the thickness of the lithium battery product, and the follow-up station automatically selects qualified battery products and automatically flows into the next process.

The utility model has been described in detail above. The above description is only a preferred embodiment of the utility model. When it cannot limit the scope of the utility model, all equivalent changes and modifications made according to the scope of the application should be Still belong to the scope covered by the present utility model.

Claims (8)

1. A small square lithium battery high-precision thickness measuring device, including a fuselage, a control system and a power supply mechanism, is characterized in that: the fuselage is installed on an X-axis mechanism to form a structure that can move horizontally, and the X-axis The mechanism is equipped with a traversing servo motor to form a driving mechanism for the horizontal traversing of the fuselage; a fixed-position thickness-measuring displacement sensor and a lifting servo motor are installed on the fuselage, and a lifting mechanism that can move up and down is installed below the thickness-measuring displacement sensor. Platform, the lifting platform is installed on the fuselage and connected with the lifting servo motor; the lower pressing plate is installed under the lifting platform, and the upper pressing plate is installed above, and the upper pressing plate and the lower pressing plate form a horizontally opposite structure separated from the lifting platform, and the upper The pressing plate and the lower pressing plate are connected into a structure that can move synchronously with the lifting platform; the thickness measuring displacement sensor is located directly above the upper pressing plate; a pressure detector is installed in the lifting platform, and the pressure detector is connected with the lower pressing plate to form a pressure on the lower pressing plate. The detection mechanism of the pressure when the lithium battery is held. 2. The high-precision thickness measuring device for a small square lithium battery according to claim 1, wherein the lifting platform includes a lifting seat and a mounting plate, and the lifting seat is installed on an upright lifting guide rail located on the facade of the fuselage, The mounting plate is horizontally fixed on the lifting seat and protrudes forward; the upper pressing plate is located above the mounting plate, the lower pressing plate is located below the mounting plate, and the pressure detector passes through the mounting plate to connect with the lower pressing plate. 3. The high-precision thickness measuring device for a small square lithium battery according to claim 2, characterized in that: the upper platen and the lower platen are connected to form a synchronous structure through a platen guide post, and the guide post is set at the position passing through the mounting plate There are oil-free bushings, and a high-precision guiding structure for the upper and lower pressure plates is formed through the oil-free bushes. 4. The high-precision thickness measuring device for a small square lithium battery according to claim 2, characterized in that: the upper platen and the lower platen are respectively provided with two pieces, arranged side by side above and below the mounting plate, and the displacement of the thickness measurement There are also two sensors, corresponding to the two upper platens respectively. 5. The high-precision thickness measuring device for a small square lithium battery according to claim 2, characterized in that the lifting servo motor is connected to the lifting seat through a combination of grinding grade screw rods to form a high-precision lifting drive structure for the lifting platform. 6. The high-precision thickness measuring device for a small square lithium battery according to claim 4, characterized in that: two fixed arms protruding forward are arranged on the top of the fuselage, and the thickness measuring displacement sensor is installed upright on the side of the fixed arms . 7. The high-precision thickness measuring device for a small square lithium battery according to claim 2, wherein the pressure detector is a high-precision circular pressure detector, which is docked with the center of the lower platen. 8. The high-precision thickness measuring device for a small square lithium battery according to claim 1, characterized in that: a marble positioning platform for placing a square lithium battery is also provided, and the marble positioning platform is horizontally arranged in front of the X-axis mechanism, And it is located in the lower direction of the lower pressing plate.