Configurable constant current charging management system

Abstract

The invention belongs to the technical field of charging management and discloses a configurable constant current charging management system. The system comprises a charging power supply, wherein the charging power supply is connected with a to-be-charged device through a constant current unit, and the constant current unit comprises a plurality of constant current branches connected in parallel, each constant current branch comprises an enabling trigger module and a resettable fuse PPTC which are connected together, and two ends of the to-be-charged device are further connected with a voltage detection module in parallel, and the voltage detection module is used for detecting voltage signals at two ends of the to-be-charged device. The voltage detection module, a plurality of enabling trigger modules and the temperature detection module are all connected with the processor, the temperature detection module is used for detecting the environment temperature, and the processor is used for controlling the corresponding resettable fuse PPTC to enter a high-resistance state through a plurality of enabling trigger modules according to the received environment temperature and voltage signals, and constant-current charging of the to-be-charged device is ensured to be completed.

Description

technical field [0001] The invention belongs to the technical field of charging management, and in particular relates to a configurable constant current charging management system. Background technique [0002] As the use of supercapacitors becomes more and more popular, the management of charging and discharging of supercapacitors becomes more and more important, especially in the field of automotive electronics, the performance requirements for the charging circuit of supercapacitors are very high, which requires extremely low radiation and conduction disturbance level, and requires low price and small size, so various new low-cost charging circuit applications are born. [0003] The traditional step-down constant current charging circuit basically adopts two methods, one is the PWM control method, such as BUCK, BUCK-BOOST and other topological structures, for the charge and discharge management of small-capacity supercapacitors (supercapacitors with a capacity less than 2...

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Problems solved by technology

[0003] The traditional step-down constant current charging circuit basically adopts two methods, one is the PWM control method, such as BUCK, BUCK-BOOST and other topological structures, for the charge and discharge management of small-capacity supercapacitors (supercapacitors with a capacity less than 20F In terms of capacity), its radiation and conduction need to spend a relatively high cost to meet the requirements of automotive electronics, and the volume is relatively large, which is not an ideal solution; the other is a linear charging circuit, which has obvious disadvantages. When charging from 0V, the voltage drop from the input voltage to the output voltage is relatively large, and the voltage drop and loss are all borne by the linear circuit, so the loss of the linear circuit is a big problem. At the same time, a relatively large heat sink is required, so the volume and heat dissipation become A problem, and the cost of the linear circuit will increase exponentially with the rise of the charging current, which cannot meet the needs of customers

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