| CPC G01M 3/20 (2013.01) [H01M 6/5083 (2013.01)] | 7 Claims |
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1. A double-vacuum four-cavity hermeticity detecting machine for square housing batteries, used for efficiently detecting a hermeticity of the square housing battery or batteries, comprises a machine platform, wherein the machine platform further comprises a loading device, four cavity devices, four cavity cover devices, four load transferring devices, two vacuum devices, a detecting device, and a discharging device;
the loading device is configured to load the battery or batteries into the four cavities sequentially;
for each cavity device of the four cavity devices, the each cavity device includes a cavity for accommodating battery or batteries;
for each cavity cover device of the four cavity cover devices, the cavity cover device is configured to close over one singular corresponding cavity device to form a sealed cavity, respectively;
for each load transferring device of the four load transferring devices, the each load transferring device is configured to load one singular corresponding cavity device of the four cavity devices and drive the cavity device to move between the loading device, the predetermined cavity cover device, and the discharging device;
for each vacuum device of the two vacuum devices, the vacuum device is configured to connect with the four cavity cover devices and can vacuum the connected sealed cavity or cavities to make the sealed cavity or cavities vacuum cavity or cavities; the two vacuum devices are configured to parallelly connect with the four cavity cover devices; the each vacuum device including a vacuum pump, a vacuum pipeline, and four vacuum baffle valves, the vacuum pump is fixed on the machine platform, the vacuum pipeline connects the vacuum pump and the four vacuum baffle valves, each of the four vacuum baffle valves is fixed on the singular corresponding cavity cover device, and is configured to open or close communication between a sealed cavity and the vacuum pipeline;
the detecting device is configured to pump a vacuum gas in the vacuum cavity to perform hermeticity leakage rate detecting of a tracer gas which comes from the inside of the battery or batteries in the vacuum cavity and can show a hermeticity leakage rate of the battery or batteries; the detecting device including a detecting pump, a hermeticity detector, a detecting pipeline, four detecting baffle valve groups, and four vacuum gauges; the detecting pump is fixed on the machine platform; each of the four detecting vacuum baffle valve groups is fixed on the singular corresponding cavity cover device for opening or closing the vacuum cavity; the detecting pipeline connects the four detecting baffle valve groups and the detecting pump; the hermeticity detector is fixed on the detecting pipeline between the four detecting baffle valve groups and the detecting pump; the detecting pump is configured to pump the vacuum gas from one vacuum cavity into the hermeticity detector; the hermeticity detector is configured to detect a flow rate per unit of time of the tracer gas in the vacuum gas to obtain the leakage rate of the tracer gas of the battery or batteries in the vacuum cavity; each of the four vacuum gauge is fixed between the singular corresponding detecting baffle valve group and the cavity cover device for detecting a vacuum level inside the vacuum cavity;
the detecting baffle valve group includes three detecting baffle valves, a muffler, and a cleaning gas connector, wherein one of the three detecting baffle valves is configured to open or close a communication between a sealed cavity and the detecting pipeline, the other of the three detecting baffle valves is configured to open or close a communication between the sealed cavity and the cleaning gas connector, and the any other of the three detecting baffle valves is configured to open or close a communication between the sealed cavity and the muffler, the cleaning gas connector is configured to access a cleaning gas to remove the tracer gas from the sealed cavity; and the muffler is configured to exhale air into the vacuum cavity or discharge the cleaning gas in the sealed cavity; and
the discharging device is configured to discharge the battery or batteries from the four cavities sequentially.
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