Electrical energy recycling system and dynamic grouping and balance logic control method thereof

Abstract

An energy recovery system includes a balancing circuit, a voltage sensor, a current sensor, a microcontroller, and an energy storage terminal. The balancing circuit controls the discharge of multiple discarded batteries, wherein these discarded batteries are of at least two different types. The voltage sensor senses the output voltage of these discarded batteries. The current sensor senses the output current of these discarded batteries. The microcontroller is coupled to the balancing circuit, the voltage sensor, and the current sensor, and sends control signals to the balancing circuit based on the output voltage and output current to instruct the balancing circuit to control the energy output state of the discarded batteries. The energy storage terminal is coupled to the microcontroller and the current sensor, and stores the energy output by the discarded batteries.

Claims

1. An energy recovery system, comprising: a balancing circuit for controlling the discharge of a plurality of discarded batteries, wherein the plurality of discarded batteries are of at least two different types; a voltage sensor for sensing the output voltage of one of the plurality of discarded batteries; a first current sensor for sensing the output current of one of the plurality of discarded batteries; a microcontroller coupled to the balancing circuit, the voltage sensor and the first current sensor, the microcontroller for sending a control signal to the balancing circuit based on the output voltage and the output current to instruct the balancing circuit to control the energy output state of one of the plurality of discarded batteries; and an energy storage terminal coupled to the microcontroller and the first current sensor, the energy storage terminal for storing one of the energy outputs from the plurality of discarded batteries.

2. The energy recovery system as claimed in claim 1, wherein the plurality of waste batteries comprises at least two of a lead-acid battery, a lithium-ion battery, and a primary battery.

3. The energy recovery system as described in claim 1 further comprises: a switching circuit coupled to the first current sensor, the microcontroller, and the energy storage terminal, wherein, The microcontroller is further used to send a pulse width modulation signal to the switching circuit based on the output voltage and output current of the plurality of discarded batteries, and the switching circuit controls whether the output current of the plurality of discarded batteries is turned on or off based on the pulse width modulation signal.

4. The energy recovery system as described in claim 3, wherein one of the pulse width modulation signals has a duty cycle of 50% to 90%.

5. The energy recovery system as described in claim 3 further comprises: a step-down converter coupled to the switching circuit; a one-way conduction circuit coupled to the step-down converter; and a relay coupled between the one-way conduction circuit and the energy storage terminal.

6. The energy recovery system as described in claim 3 further comprises: a boost converter coupled to the switching circuit; and a relay coupled between the boost converter and the energy storage terminal.

7. The energy recovery system as claimed in claim 1, wherein the energy storage terminal includes: a second current sensor for sensing the output current input to the energy storage terminal; and an energy storage element coupled to the second current sensor, wherein, The microcontroller is further used to generate the control signal based on the output current sensed by the second current sensor and the charge information of one of the energy storage elements.

8. The energy recovery system as claimed in claim 7, wherein the microcontroller is further configured to calculate an average discharge current value based on the output current sensed by the second current sensor, and to change the energy output state of the plurality of waste batteries to stop energy output when the average discharge current value is lower than a minimum operating current required by the energy storage terminal three times.

9. A dynamic grouping and balancing logic control method for an energy recovery system as described in claim 1, the dynamic grouping and balancing logic control method being performed by the microcontroller and comprising: scanning a plurality of voltages corresponding to a plurality of waste batteries; when the voltage of one lead-acid battery among the plurality of waste batteries is greater than the sum of the voltages of the remaining waste batteries among the plurality of waste batteries exceeding a first threshold, causing the lead-acid battery to discharge individually; and when the voltage of the lead-acid battery is not one of the maximum voltages among the plurality of waste batteries, the difference between the maximum voltage and one of the minimum voltages among the plurality of waste batteries does not exceed a second threshold, and the difference between the voltage of the lead-acid battery and the sum of the voltages of the remaining waste batteries among the plurality of waste batteries does not exceed a third threshold, causing the plurality of waste batteries to discharge together.

10. The dynamic grouping and balancing logic control method as described in claim 9 further includes: when a first voltage of one of the plurality of selected waste batteries in the plurality of waste batteries is greater than a second voltage of one of the plurality of non-selected waste batteries in the plurality of waste batteries, causing the plurality of selected waste batteries to discharge together.

Images