232results about How to "Play the role of security protection" patented technology

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a safety device for a lithium ion battery. The safety device comprises a top cover plate, a first post, a second post, an overturning plate and a conducting plate, wherein the first and second posts are arranged on the top cover plate; the first post is assembled with the conducting sheet in an insulating manner; the overturning plate is arranged between the first post and the conducting plate, and is electrically connected with the first post and the conducting plate respectively; the conducting plate is provided with a sunken surface with a nick. According to the safety device for the lithium ion battery, the lithium ion battery is provided with the overturning plate and the conducting plate, which are electrically connected with each other, the sunken surface is arranged on the conducting plate, and the nick is formed in the sunken surface, therefore, the sunken surface can be effectively broken by air pressure to cut off a charging circuit when the air pressure in the lithium ion battery reaches a limit value, and a safety protection function is realized.

The invention discloses a leakage protection device with an extended function, belonging to the field of a low-voltage power distribution protection device. The leakage protection device comprises a zero-sequence current transformer, a release, an IC (integrated circuit) drive circuit, a test circuit and a function extension circuit; wherein the release is connected with a power grid, and a phase line, a zero line and an earth wire are led to supply electricity to a load; one end of an electromagnet coil of the release is connected with the G end of the IC drive circuit, and the other end of the electromagnet coil of the release is connected with the phase line which does not pass through the zero-sequence current transformer; one end of a secondary coil of the zero-sequence current transformer is connected with the A end of the IC drive circuit, and the other end of the secondary coil of the zero-sequence current transformer is connected with the B end of the IC drive circuit; the H end of the IC drive circuit is connected with the output end of the function extension circuit; the B end of the IC drive circuit is connected with a reference voltage input end of the function extension circuit; the K end of the test circuit is connected with the phase line which does not pass through the zero-sequence current transformer, and the input end of the function extension circuit is connected with the earth wire. The leakage protection device can provide immediate protection to abnormal electrification of the earth wire of the power grid or electrification of a housing of an electric appliance, and the temperature rise protection is achieved.

The invention relates to a winding buffering mechanism and a winding device. The winding buffering mechanism comprises a first driving disc, a second driving disc and buffering elastic pieces, the first driving disc is provided with a center shaft and N first force arms distributed circumferentially, N is a positive integer, the second driving disc is circumferentially provided with N second force arms corresponding to the first force arms in a one-to-one mode, the second driving disc can be rotatably arranged on the center shaft in a sleeved mode, the N first force arms are mutually crossed with the N second force arms, each first force arm and the corresponding second force arm are adjacent in position, the buffering elastic pieces are arranged in spaces respectively formed after each first force arm and the corresponding second force arm are crossed, and the two ends of each buffering elastic piece abut against the corresponding first force arm and the corresponding second force arm respectively. The winding buffering mechanism performs a safety protection function.

The invention relates to a device which carries out the filtration on the fluid medium conveyed by the pipeline, in particular to a cleanable filter which can realize the hydrocyclone separation, surface interception and deep filtration of the impurity in the fluid medium at the same time. The filter is provided with an inlet pipeline, a filter unit group, a sewage drainage pipeline and an outlet pipeline; the filter unit group is internally provided with a standby filter unit; an inlet cutting valve is arranged between all filter units of the inlet pipeline and the filter unit group; the inlet pipeline is connected with each filter unit by the inlet cutting valve; an outlet cutting valve is arranged between all filter units of the outlet pipeline and the filter unit group; the output pipeline is connected with each filter unit by the outlet cutting valve. The device of the invention can carry out the maintenance under the situation that shutdown is not necessary and the pipeline normally conveys the medium, can replace the filter unit; furthermore, when the impurities are automatically back-cleaned, the pressure and flux of the conveyed medium can be ensured to be stable.