Abstract: This paper designed an embedded integrated rechargeable battery system which could achieve a variety of energy collection.The battery system can be used in the multiple micro-sensor nodes of monitoring and warning system,which can make use of environment temperature and heating signal to charge directly.The system is made of a pyroelectric element,rectifier circuit,the DC/DC voltage boost circuit and a switch control circuit module.The article analysised the influence of the electrical parameters of the pyroelectric unit in the thermal cycle on the charge of the capacitor charge;besides,gave the key part of the circuit design of the pyroelectric charge battery and made study of design of improved CMOS rectifier circuit,booster circuit and switch control circuit.The study does not only improve the efficiency of the output,but also achieve a high degree of integration.The simulation and experiment results show that making use of the pyroelectricity to collect and store the energy is effective and feasible.