Device and method for measuring thickness of square battery

Abstract

The invention provides a device and method for measuring the thickness of a square battery. The device comprises a fixture with two opposite inner surfaces, a first gas circuit, a second gas circuit, a measuring basis head and a thickness measurer with a measuring head, wherein the first gas circuit is arranged on the side, with the first inner surface of the two inner surfaces, of the fixture, the second gas circuit is arranged on the side, with the second inner surface of the two inner surfaces, of the fixture, the measuring basis head arranged on the second inner surface of the fixture, and the thickness measurer with the measuring head is arranged on the side, with the first inner surface, of the fixture. The method comprises the steps that the battery is placed into the fixture, the first gas circuits works to eject gas flow to blow the battery from the side with the first inner surface so that the battery can shift to abut against the measuring basis head, and the measuring head stretches out of the thickness measurer to carry out measurement; after measurement is finished, the first gas circuit stops working, the second gas circuit starts to work at the same time and ejects gas flow to blow the battery from the side with the second inner surface so that the battery can shift to be blown away from the measuring basis head.

Description

technical field [0001] The invention relates to a device and a method for measuring the thickness of a square battery, in particular to a device and a method for measuring the thickness of a square battery under the condition of using airflow to displace and position the square battery. Background technique [0002] A prismatic battery is a widely used battery, and since a qualified prismatic battery has various standard specifications, all aspects of the finished prismatic battery must meet these standard specifications. Therefore, the appearance dimensions such as thickness must be measured before the prismatic battery leaves the factory. In particular, the manufacturing process of lithium-ion prismatic batteries requires battery thickness measurement after decompression sealing is completed. [0003] In the prior art, there are various devices and methods for measuring the appearance dimensions such as the thickness of the prismatic battery. [0004] CN201177492Y disclo...

AI Technical Summary

Problems solved by technology

[0006] However, with the above-mentioned prior art devices, it cannot be efficiently carried out in an automatic manner, and it is impossible to completely avoid scratches on the surface of the battery.

[0007] In the process of measuring the thickness of a prismatic battery, sometimes the action of leaning against and breaking away from the reference head cannot be accurately realized, so that the surface of the battery sometimes does not touch the reference head (reference point), which will cause errors in the thickness of the battery Measurement

Moreover, when the battery leaning against the reference head is taken out from the fixture after the test is completed, it is easy to scratch with the reference head, thereby producing scratches on the battery surface, resulting in poor appearance of the battery surface

[0008] Moreover, if the thickness of the battery is measured manually, it will take a lot of manpower, and the production cost will also increase.

However, if the thickness of the battery is measured in an automatic way, the manipulator cannot accurately realize the action of leaning against and breaking away from the reference head when putting in and taking out the battery, and the surface of the battery sometimes cannot touch the reference head, causing errors. In addition, when the battery leaning against the reference block leaves the fixture after the measurement is completed, it is easy to produce scratch marks with the reference head, resulting in poor appearance of the battery surface

[0009] Therefore, although various researches have been done on devices and methods for measuring the thickness of a prismatic battery in the prior art, it has not been found that it can be performed efficiently in an automatic manner and ensure that the surface of the battery does not cause scratch marks to cause damage. Apparatus and method for poor battery surface appearance

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