CN108398111A - A kind of method for soft package lithium ion power thickness measurement device - Google Patents

Abstract

The invention discloses a soft package lithium ion power battery thickness measuring device, which comprises a frame, a sample placement platform, a thickness detection mechanism, a pressure simulation mechanism and an industrial computer. The sample placement platform and the pressure simulation mechanism are arranged on the frame, and the thickness detection The mechanism includes a lifting plate, a test plate, a lifting drive device and a displacement sensor. The lifting drive device is fixed on the frame, and the lifting plate is slidably connected to the frame and connected to the lifting drive device. The test plate is located under the lifting plate. And it is slidingly connected with the lifting plate, the displacement sensor is fixed on the lifting plate, the probe of the displacement sensor is located under the lifting plate, the pressure simulation mechanism is located above the thickness detection mechanism, and the thickness detection mechanism and the pressure simulation mechanism are connected to the industrial computer. The invention can accurately measure the thickness of the soft pack lithium ion power battery.

Description

A thickness measuring device for a soft-packed lithium-ion power battery

technical field

The invention relates to a battery testing device, more specifically, it relates to a soft-pack lithium-ion power battery thickness measuring device.

Background technique

The thickness of the soft-packed lithium-ion power battery needs to be tested before it is installed in the battery module. However, because the surface of the soft-packed lithium-ion power battery is soft, after being installed in the battery module, it has a relatively stable thickness under the constraints of the battery module. Shape and size, so there is no suitable method to detect the thickness after the battery is formed and before sorting. The current method of measuring the thickness of the soft-pack lithium-ion power battery is to use a vernier caliper to measure in a conventional way, but the non-rigid battery surface cannot provide a fixed vernier caliper clamping surface, and different forces are applied to the battery surface to measure the thickness, and there will be different results. The detection value, because it is impossible to simulate the pressure on the surface of a single battery after it is installed in the battery module, it is difficult to know how tightly the caliper should be clamped to obtain the real parameters of the battery when the battery is clamped with a vernier caliper, so the result of this measurement is Inaccurate, if there is a battery with a thickness exceeding the standard, it cannot be found, and the defective product will flow into the module line for assembly, and finally cause the thickness of the battery module to exceed the standard, and the plastic bracket of the module will bulge and deform, affecting the overall performance of the battery. The utility model with the publication number CN200944041 disclosed a lithium-ion battery thickness detection device on September 5, 2007. It is characterized in that it is composed of a base, a check block, and a caliper. The base is in the shape of a slope. There is a test block supported upwards, and the two ends of the cylindrical caliper are fixedly connected with the test blocks supported on both sides of the base; there is a gap between the cylindrical caliper and the upper surface of the base; the upper surface of the base and the surface of the cylindrical caliper Layers of insulating tape are provided respectively. The device has a simple structure and is convenient to use, does not cause a battery short circuit during detection, and the thickness detection is accurate. It can be widely used in the thickness inspection and sorting of various battery production processes, and the detection standards are reliable. The purpose of detecting batteries with different thicknesses can be achieved by replacing the thickness measuring calipers, which is simple and easy. And effectively guarantee the surface quality of the battery and reduce the manufacturing cost of the lithium-ion battery thickness measuring device. Especially, the invention has remarkable effect on improving the detection efficiency of the thickness of the polymer lithium ion battery and the surface quality of the battery. At the same time, it is easy to form industrial scale. However, this utility model has high requirements on the surface condition of the battery, and at the same time, it cannot adjust the pressure according to the thickness difference of the battery, resulting in inconsistent measurement thickness, and it is difficult to provide accurate data for module design.

Contents of the invention

Existing methods for measuring the thickness of soft-pack lithium-ion power batteries cannot simulate the pressure on the surface of a single battery after it is installed in the battery module. The thickness of the module exceeds the standard, which affects the overall performance of the battery. In order to overcome this defect, the present invention provides a pressure-bearing condition that can simulate the surface of a single battery after it is installed in the battery module, so as to accurately measure the thickness of the soft-pack lithium-ion power battery. Thickness measurement equipment for soft-pack lithium-ion power batteries to ensure that the thickness of the assembled battery module meets the standard.

The technical solution of the present invention is: a soft package lithium-ion power battery thickness measurement equipment, including a frame, a sample placement platform, a thickness detection mechanism, a pressure simulation mechanism and an industrial computer, and the sample placement platform and the pressure simulation mechanism are set on the frame The thickness detection mechanism includes a lifting plate, a test plate, a lifting drive device and a displacement sensor. The lifting drive device is fixed on the frame, and the lifting plate is slidably connected to the frame and connected to the lifting drive device. The lifting plate is below and slidingly connected with the lifting plate, the displacement sensor is fixed on the lifting plate, the probe of the displacement sensor is located under the lifting plate, the pressure simulation mechanism is located above the thickness detection mechanism, and the thickness detection mechanism and the pressure simulation mechanism are connected to the industrial computer. When using this soft-pack lithium-ion power battery thickness measurement equipment to measure the soft-pack lithium-ion power battery, put the battery on the sample placement platform, under the control of the industrial computer, the thickness detection mechanism starts, the test board is lowered with the lifting plate, and pressed For the battery sample to be tested, the battery sample under the test board will make the test board at a height, and the top of the test board will touch the probe of the displacement sensor, so that the thickness of the battery sample can be reflected by the value measured by the displacement sensor. Due to the sliding connection between the test plate and the lifting plate, the test plate can adapt to the thickness of the battery sample by itself, and keep in contact with the battery sample but the pressure on the battery sample is small. After that, the pressure simulation mechanism starts to work and gradually pressurizes the battery sample until it reaches It is equal to or close to the actual pressure value of the battery in the battery module, and the indication displayed by the displacement sensor at this time is the thickness of the battery under the constraint state of the battery module. When measuring the thickness of the battery, the present invention fully considers the situation that the size of the soft-packed lithium-ion power battery will change after it is installed in the battery module, and provides the measurement by simulating the pressure bearing condition of the surface of a single battery after it is installed in the battery module. The measurement conditions are close to the real working conditions, so the thickness of the soft-pack lithium-ion power battery measured in this case is also a more accurate value that is closer to reality.

Preferably, the pressure simulation mechanism includes a pressure device and a pressure sensor accessible by the pressure device, the pressure device is fixed on the top of the frame, the pressure sensor is fixed on a pressure conduction plate, and the pressure conduction plate is connected to the top of the test board. The pressure device is used to provide pressure, and the pressure exerted by the pressure device acts directly on the pressure sensor, and is transmitted to the test plate through the pressure sensor and the pressure conduction plate, so the pressure provided by the pressure device is finally transmitted to the battery sample through the test plate, and The pressure can be read directly through the pressure sensor and fed back to the industrial computer to control the pressure so as to be close to the pressure that the battery is subjected to in the battery module to achieve a better simulation effect.

Preferably, a plurality of connecting rods are slidably connected on the lifting plate, the top ends of the connecting rods are fixedly connected to the pressure conducting plate, and the bottom ends of the connecting rods are fixedly connected to the test board. The connecting rod is fixedly connected to the test board, and at the same time slides through and connects to the lifting board. Therefore, through the connection of the connecting rod, the sliding connection between the test board and the lifting board is realized.

Preferably, the connecting rod is provided with an upper limit boss and a lower limit baffle, the upper limit boss is located above the lifting plate, and the lower limit baffle is located below the lifting plate. Setting the upper limit boss and the lower limit baffle can limit the range of relative movement between the test board and the lifting board, prevent the test board from sliding off the lifting board without limit in the free state, and prevent the test board from being unrestricted when it is close to the lifting board result in rigid contact and damage.

Preferably, a slide rail is fixed on the frame, and the lifting plate is connected with the slide rail through a slide block. Through the cooperation of the slider and the slide rail, the lifting plate and the frame are slidably connected with a relatively simple structure.

Preferably, the lifting drive device is a lifting cylinder, the lifting cylinder is fixed on the frame, and the piston rod of the cylinder is connected to the lifting plate. The lifting plate is driven up and down by the cylinder, which has a simple structure and is easy to implement.

Preferably, the pressure device is a pressurized cylinder, the pressurized cylinder is fixed on a pallet, and the pallet is fixed on the machine frame. A cylinder is used as a pressure device to pressurize the battery sample, which has a simple structure and is easy to implement.

Preferably, the frame is provided with a touch control screen and an industrial control display screen. Setting a touch control screen can provide an operating device with a small space occupation and a high degree of functional integration, which contributes to the simplification of the appearance of the equipment and the convenience of operation. Setting the industrial control display screen can visually display the operating status parameters and measurement parameters of the equipment, which is convenient for monitoring the operating status of the equipment and directly obtaining the measurement results.

The beneficial effects of the present invention are:

High measurement accuracy. The present invention can simulate the pressure bearing condition of a single battery surface after it is installed in the battery module through the pressure simulation mechanism to provide measurement conditions close to the real working conditions for the measurement. Closer to real data, higher accuracy.

Description of drawings

Fig. 1 is a kind of structural representation of the present invention;

Fig. 2 is the front view of the present invention;

Fig. 3 is a kind of structural representation of thickness detection mechanism in the present invention;

Fig. 4 is a structural schematic diagram of another perspective of the thickness detection mechanism in the present invention;

Fig. 5 is a side view of the thickness detection mechanism in the present invention.

In the figure, 1-frame, 2-sample placement platform, 3-lifting plate, 4-testing plate, 5-lifting cylinder, 6-displacement sensor, 7-pressurizing device, 8-pressure sensor, 9-pressure conduction plate , 10-connecting rod, 11-upper limit boss, 12-lower limit baffle, 13-slide rail, 14-support plate, 15-pressure head, 16-touch control screen, 17-industrial control display, 18-power master control Taiwan, 19-industrial computer, 20-probe.

Detailed ways

The present invention will be further described below in conjunction with the specific embodiments of the accompanying drawings.

Example 1:

As shown in Figures 1 to 5, a soft-pack lithium-ion power battery thickness measurement device includes a frame 1, a sample placement platform 2, a thickness detection mechanism, a pressure simulation mechanism and an industrial computer 19, a sample placement platform 2, and a pressure simulation The mechanism is arranged on the frame 1, and the thickness detection mechanism includes a lifting plate 3, a test plate 4, a lifting drive device and four displacement sensors 6, the lifting drive device is fixed on the frame 1, and the lifting plate 3 is slidably connected to the On the frame 1 and connected with the lifting drive device, the test board 4 is located under the lifting plate 3 and is slidingly connected with the lifting plate 3, the displacement sensor 6 is fixed on the lifting plate 3, and the probe 20 of the displacement sensor 6 is located under the lifting plate 3 , the pressure simulation mechanism is located above the thickness detection mechanism, and both the thickness detection mechanism and the pressure simulation mechanism are connected to the industrial computer 19 . The pressure simulation mechanism includes a pressure device and a pressure sensor 8 that can be touched by the pressure device. The pressure device is fixed on the top of the frame 1, and the pressure sensor 8 is fixed on a square pressure transmission plate 9. The pressure transmission plate 9 is connected to the Test board 4 top. There are four piercing holes arranged in a square on the lifting plate 3, and a connecting rod 10 is slid and connected in each piercing hole respectively. The bottom end is fixedly connected on the test board 4 . The four displacement sensors 6 are also arranged in a square and surround the four connecting rods 10 . The connecting rod 10 is provided with an upper limit boss 11 and a lower limit baffle 12 , the upper limit boss 11 is located above the lifting plate 3 , and the lower limit baffle 12 is located below the lifting plate 3 . A slide rail 13 is respectively fixed on two symmetrical rear columns of the frame 1, and a pair of slide blocks are fixed on the rear edge of the lift plate 3, and the lift plate 3 is connected with the slide rail 13 by the slide block. Described lifting driving device is a lifting cylinder 5, and lifting cylinder 5 is fixed on the frame 1, and the piston rod of lifting cylinder 5 is connected on the lifting plate 3. Described pressure device is a pressurized cylinder 7, and pressurized cylinder 7 is fixed on a supporting plate 14, and supporting plate 14 is fixed on the frame 1, and the piston rod of pressurized cylinder 7 is vertically downward, and the piston rod of pressurized cylinder 7 A pressure head 15 is threadedly connected to the piston rod, and the position of the pressure head 15 on the piston rod of the pressurizing cylinder 7 is adjustable. The central part of the front of the frame 1 is provided with a power master console 18, and the power master console 18 is provided with a start/shutdown button and a barcode scanner, and the top of the frame 1 is provided with a touch control screen 16 and an industrial control display screen 17.

Before measuring the battery sample, the lifting cylinder 5 is pressed down once, so that the test plate 4 touches the product placement platform 2, and then the value of the displacement sensor 6 is calibrated to 0.00. When starting the measurement, scan the barcode of the battery sample to be tested and place it under the test board 4. Under the control of the industrial computer, the lifting cylinder 5 drives the test board 4 down to touch the battery sample, and then the pressurized cylinder 7 is applied to the battery module. The test plate 4 is pressed against the same pressure as the battery. Different types of batteries require different pressure values. The pressure range is 2940N-4900N. The probes of four displacement sensors 6 installed in different positions touch the test board 4, and the displacement sensors 6 transmit the thickness value to the industrial computer 19 and match it with the barcode of the battery, which facilitates the retrieval of values and subsequent traceability.

Example 2:

There are six connecting rods 10. All the other are with embodiment 1.

Claims (8)

1. a kind of method for soft package lithium ion power thickness measurement device, it is characterized in that including rack（1）, sample placement platform（2）、 Thickness detection mechanism, pressure simulation mechanism and industrial personal computer, sample placement platform（2）, pressure simulation mechanism be set to rack（1）On, Thickness detection mechanism includes lifter plate（3）, test board（4）, lifting drive and displacement sensor（6）, lifting drive It is fixedly arranged on rack（1）On, lifter plate（3）Liftably it is slidably connected to rack（1）Above and with lifting drive it is sequentially connected, Test board（4）Positioned at lifter plate（3）Lower section and and lifter plate（3）It is slidably connected, displacement sensor（6）It is fixed on lifter plate（3） On, displacement sensor（6）Probe be located at lifter plate（3）Lower section, pressure simulation mechanism are located above thickness detection mechanism, thickness Testing agency, pressure simulation mechanism access industrial personal computer.

2. method for soft package lithium ion power thickness measurement device according to claim 1, it is characterized in that the pressure simulation Mechanism includes pressure apparatus and the pressure sensor that can be touched by pressure apparatus（8）, pressure apparatus is fixedly arranged on rack（1）Top, Pressure sensor（8）It is fixedly arranged on a pressure conduction plate（9）On, pressure conduction plate（9）It is connected to test board（4）Top.

3. method for soft package lithium ion power thickness measurement device according to claim 2, it is characterized in that lifter plate（3）Upper cunning Dynamic wear is connected with more connecting rods（10）, connecting rod（10）Top is connected in pressure conduction plate（9）On, connecting rod（10）Bottom end is connected In test board（4）On.

4. method for soft package lithium ion power thickness measurement device according to claim 3, it is characterized in that connecting rod（10）On Equipped with upper limit boss（11）With lower limit baffle（12）, upper limit boss（11）Positioned at lifter plate（3）Top, lower limit baffle（12）It is located at Lifter plate（3）Lower section.

5. method for soft package lithium ion power thickness measurement device according to claim 1, it is characterized in that rack（1）It is upper fixed There is sliding rail（13）, lifter plate（3）Pass through sliding block and sliding rail（13）Connection.

6. method for soft package lithium ion power thickness measurement device according to claim 1, it is characterized in that the lifting drives Device is a lifting cylinder（5）, lifting cylinder（5）It is fixed on rack（1）On, the piston rod of the cylinder is connected to lifter plate（3） On.

7. method for soft package lithium ion power thickness measurement device according to claim 2, it is characterized in that the pressure apparatus For a pressurized cylinder（7）, pressurized cylinder（7）It is fixed on a supporting plate（14）On, supporting plate（14）It is fixed on rack（1）On.

8. method for soft package lithium ion power thickness measurement device according to any one of claim 1 to 7, it is characterized in that machine Frame（1）It is equipped with touch control screen and industry control display screen.