Rapid detection device and detection method for reliability of lithium battery current cut-off device

A current cut-off device and detection device technology, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., can solve the problems of slow manual operation, lack of penetration, fire, etc., and achieve the effect of fast and convenient use

Active Publication Date: 2021-06-08
SHANGHAI RES INST OF CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this technical solution, the handle is used to push the threaded drill rod to drill into the battery, which requires high professionalism of the operator. If the drill is too deep, it may drill through the battery diaphragm and cause an internal short circuit, which may cause fire or explosion. If the drill is too shallow, it may not Drilling through the battery case will not ventilate the inside of the battery, which poses a certain safety risk
Additionally, manual operations are slow and test results are less consistent

Method used

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  • Rapid detection device and detection method for reliability of lithium battery current cut-off device
  • Rapid detection device and detection method for reliability of lithium battery current cut-off device
  • Rapid detection device and detection method for reliability of lithium battery current cut-off device

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Embodiment 1

[0057] The rapid evaluation equipment for the reliability of the current interrupt device (CID) in the lithium battery in this embodiment, its structural schematic diagram is as follows Figure 4-8 As shown, it includes: a spindle box 1, a stepper motor 2, a programmable logic controller 3, a laser rangefinder 5, a test drill 6 or a standard drill 7 are installed on the spindle box 1, wherein the stepper motor 2 passes through a The leading screw 4 of the dust cover is connected with the column 8 and the base 11, and the workbench 10 is fixed on the column 8 with a fixed handle 9.

[0058] The overall device is a vertical drilling system structure, in which the headstock 1 provides power for the drilling parts of the drill bit, the stepper motor 2 and the lead screw 4 with a dust cover are responsible for providing power for the axial displacement of the headstock, and the laser measuring The spacer 5 is responsible for aligning the axial position of the spindle box and the wo...

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Abstract

The invention relates to a rapid detection device and detection method for the reliability of a lithium battery current cut-off device, and the device comprises a pedestal, a vertical column, a lead screw, a stepping motor, a workbench, a main shaft box, a laser range finder, and a drill bit suite. The stepping motor is in transmission fit with the lead screw. The laser range finder obtains vertical distance information and corresponding position information between the spindle box and the workbench; and the drill bit suite is detachably connected into the drill bit interface, so that punching on the top cover of the battery sample is realized, the current cut-off device is triggered in a programmed physical mode, and the reliability of the current cut-off device is detected under the condition that no gas is generated in the battery. Compared with the prior art, by designing the special drilling device, the reliability of the current cut-off device (CID) of the cylindrical lithium battery finished product can be directly detected, the use is rapid, convenient, simple and efficient, and the device is suitable for second-party and third-party quality inspection and detection of the cylindrical lithium battery product.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery safety evaluation, in particular to a rapid detection device and a detection method for the reliability of a lithium battery current cut-off device. Background technique [0002] Lithium battery safety devices are generally integrated in the cap structure of the battery cell, including thermistor (Positive Temperature Coefficient), current interrupt device (Current Interrupt Device), safety valve (Safety Vent, also known as pressure relief valve), etc. When the lithium battery heats up and gas is generated inside, the welding part can be pulled off by the action of the valve plate, and the circuit is disconnected. If the internal pressure of the battery continues to rise, the valve plate will rupture, and the gas will be released to prevent the lithium battery core from being damaged due to internal pressure. Explosive too high. [0003] The current cut-off device is a protective func...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
CPCG01R31/36Y02E60/10
Inventor 郭文翔张小沁储德韧许铤王寅杨昊
Owner SHANGHAI RES INST OF CHEM IND
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