Wireless sensor network node solar charging and storage battery discharging protective circuit

Abstract

The invention discloses a wireless sensor network node solar charging and storage battery discharging protective circuit in a solar power supply device. A charging protective circuit comprises a comparator AR1, a triode VT1, a voltage stabilizing tube D1 and a shunt regulator J1; a discharging protective circuit comprises a comparator AR2, a shunt regulator J2, a triode VT5 and P-MOS (P-Metal Oxide Semiconductor) tubes VT2 and VT4, as well as an N-MOS (N-Metal Oxide Semiconductor) tube VT3; when the voltage of a storage battery is close to a rated voltage -10%, the discharging protective circuit is positioned in a low-threshold voltage UTHL state of a hysteresis region; when the voltage of the storage battery is close to UTHL +0.3V, the discharging protective circuit is positioned in a high-threshold voltage UTHH state of the hysteresis region; through the adoption of the wireless sensor network node solar charging and storage battery discharging protective circuit disclosed by the invention, voltage difference of storage battery discharging protection and power supply recovery is achieved, voltage oscillation phenomenon of the discharging protective circuit during acting is eliminated, overcharging of a solar cell panel in the charging process is effectively prevented, and the storage battery cannot be damaged by over-discharge under the circumstance that continuous sun exposure is not enough.

Description

technical field [0001] The invention belongs to the power supply technology in the wireless communication field, and in particular relates to a solar charging and storage battery discharge protection circuit in a solar power supply device, which protects lead-acid storage batteries that supply power to general nodes and convergence nodes of wireless sensor networks. Background technique [0002] Wireless sensor networks have broad application prospects in the field of large-scale remote environmental monitoring. However, due to the limited power energy carried by network nodes, large deployment areas and long distances, it is unrealistic to replace batteries to supplement energy. Using solar panels to charge node batteries has become one of the feasible ways to achieve continuous energy supply of nodes. The energy for charging the battery comes from solar panels, and the continuous energy provided for the nodes comes from the battery. Therefore, the circuit is required to be...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the complex solar charge and discharge protection circuit, high energy consumption, damage of the battery due to over-discharge and the occurrence of voltage in the discharge protection in the power supply control system of the wireless sensor network node in the prior art. Insufficient oscillation provides a solar charging and storage battery discharge protection circuit with simple circuit, low energy consumption, and overcoming voltage oscillation

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