Composite start power supply and circuit control method thereof

Abstract

The invention discloses a composite start power supply and a circuit control method thereof. A super capacitor module of the composite start power supply is connected with a starting motor and a charging set. The power charging set is connected with the super capacitor module. A battery module is in double-way connection with the super capacitor module through a DC / DC module. A switch K1 is arranged on the circuit where the DC / DC module and the power charging module are connected with the super capacitor module, and the on-off of the switch K1 is controlled by a control circuit. The circuit control method of the composite start power supply can well overcome various situations such as the situation that the electric supply is supplied, the situation that the electric supply is not supplied, the situation that a motor is started and the situation that the electric supply is not supplied to the charging set or the battery module is not connected into a system, or the battery module is connected into the system but the voltage is lower than a preset value. The composite start power supply is a composite power supply with the super capacitor and the battery module combined to be used, the alternating current charging scheme and the direct current charging scheme are considered, the fact that energy can be sufficiently used is guaranteed, and the safety and service life of a lithium battery module or a lead-acid cell module are enhanced and prolonged.

Description

technical field [0001] The invention relates to a composite energy storage device and a circuit control method thereof, in particular to a composite starting power supply composed of a supercapacitor module and a lithium battery module or a lead-acid battery module and a circuit control method thereof. Background technique [0002] At present, the starting power commonly used to start internal combustion engines or diesel internal combustion engines or generators is lead-acid batteries. However, due to the small discharge rate of lead-acid batteries, it is necessary to use large-capacity lead-acid batteries to provide instantaneous power support for the start of internal combustion engines. The volume and weight are very large, which is not conducive to the installation and transportation of the product; at the same time, the main component of lead-acid batteries is lead, which is a heavy metal, which is a serious hazard to the environment. The electrolyte is an aqueous solu...

AI Technical Summary

Problems solved by technology

However, due to the small capacity of the super capacitor, it is difficult to support multiple high-current discharges. In order to ensure the successful startup of related equipment, the capacity of the super capacitor module needs to be increased, which will increase the cost.

[0005] In addition, the supercapacitor has a small capacity and its own self-discharge is relatively large. In the case of long-term idle, the voltage drops quickly. It is still difficult to replace the current lead-acid battery with the supercapacitor module alone.

At present, the starting module of the super capacitor is mainly used for emergency starting. There is no corresponding product for the starting module of the commonly used internal combustion engine or diesel internal combustion engine or generator. There is an urgent need for a product that can replace the current lead-acid battery and optimize the current super capacitor. module

Images