Abstract: An electrochemical device includes a shell, an electrode post, and an electrode assembly. A through-hole is provided on the shell. The electrode post is disposed on the shell and at least partially accommodated in the through-hole. The electrode post is electrically connected to the electrode assembly. A frangible portion is provided at a position corresponding to the through-hole on the electrode post. The frangible portion is configured to be burst open when a pressure in the shell reaches a threshold, so as to implement communication between inside and outside of the shell to relieve the pressure. Provided on the electrode post, the frangible portion can be broken when the pressure in the electrochemical device reaches the threshold, so as to relieve the pressure in the electrochemical device.

Abstract: The present invention discloses a livestock tracing system and method. The system includes: a feeding module, an adopting and purchasing module, a weighing module, a server, a first commutation module and a second communication module; the feeding module is configured to provide food intake information of livestock and transmit the food intake information to the server via the first communication module; the weighing module is configured to provide weight information of the livestock and transmit the weight information to the server via the second communication module; the adopting and purchasing module is configured to provide vaccine information of the livestock and transmit the vaccine information to the server; and the server is configured to store the food intake information, the weight information and the vaccine information, and obtain corresponding tracing information according to a tracing look-up instruction.

Abstract: A battery pack includes: a packaging housing, including a first arcuate plate and a second arcuate plate, an inner arcuate surface of the first arcuate plate being opposite to an outer arcuate surface of the second arcuate plate; and at least one set of electrode assemblies, comprising a first arcuate electrode assembly and a second arcuate electrode assembly, the first arcuate electrode assembly is disposed on the inner arcuate surface of the first arcuate plate, the second arcuate electrode assembly is disposed on the outer arcuate surface of the second arcuate plate, the inner arcuate surface of the first arcuate electrode assembly and the outer arcuate surface of the second arcuate electrode assembly face to each other, and a first spacing is defined between the inner arcuate surface of the first arcuate electrode assembly and the outer arcuate surface of the second arcuate electrode assembly.

Abstract: A battery including a curved metal shell, a curved metal plate, and a curved electrode assembly. The curved metal shell has a curved surface and a plurality of side walls extending from the curved surface. The curved electrode assembly is disposed between the curved metal shell and the curved metal plate. The plurality of side walls are bound with the curved metal plate to seal the curved electrode assembly between the curved metal shell and the curved metal plate. By disposing a direction of an opening of the curved metal shell, the difficulty in the manufacturing process of the battery is greatly reduced, curved electrode assemblies in different structural forms are placed into the curved metal shell more conveniently and smoothly, and the energy density of the battery is also increased.

Abstract: The present invention discloses a live pig quantity checking apparatus and method. The checking method includes: obtaining first electronic ear tag numbers of electronic ear tags within a period of time interval threshold range; determining whether live pigs in a monitored piggery all have a food intake activity, and if yes, determining a quantity of the live pigs according to the first electronic ear tag numbers; and if no, determining live pigs not having the food intake activity according to the first electronic ear tag numbers. The live pig quantity checking apparatus and method of the present invention improves the live pig quantity checking efficiency.

Abstract: The present invention discloses a method and system for monitoring an epidemic disease in a piggery. The monitoring method includes: obtaining a historical food intake amount, historical environmental parameters, a historical health state and a historical epidemic disease state of a live pig, where the historical environmental parameters include a temperature, a humidity, and concentration of gas in the air; establishing a piggery monitoring model by taking the historical food intake amount and the historical environmental parameters as an input and the historical health state and the historical epidemic disease state as an output; determining a first current state of the live pig according to the piggery monitoring model, where the first current state includes a healthy state and an epidemic disease state; and monitoring a monitored piggery according to the first current state.

Abstract: The present invention discloses a livestock tracing system and method. The system includes: a feeding module, an adopting and purchasing module, a weighing module, a server, a first commutation module and a second communication module; the feeding module is configured to provide food intake information of livestock and transmit the food intake information to the server via the first communication module; the weighing module is configured to provide weight information of the livestock and transmit the weight information to the server via the second communication module; the adopting and purchasing module is configured to provide vaccine information of the livestock and transmit the vaccine information to the server; and the server is configured to store the food intake information, the weight information and the vaccine information, and obtain corresponding tracing information according to a tracing look-up instruction.

Abstract: A battery pack includes: a packaging housing, including a first arcuate plate and a second arcuate plate, an inner arcuate surface of the first arcuate plate being opposite to an outer arcuate surface of the second arcuate plate; and at least one set of electrode assemblies, comprising a first arcuate electrode assembly and a second arcuate electrode assembly, the first arcuate electrode assembly is disposed on the inner arcuate surface of the first arcuate plate, the second arcuate electrode assembly is disposed on the outer arcuate surface of the second arcuate plate, the inner arcuate surface of the first arcuate electrode assembly and the outer arcuate surface of the second arcuate electrode assembly face to each other, and a first spacing is defined between the inner arcuate surface of the first arcuate electrode assembly and the outer arcuate surface of the second arcuate electrode assembly.