Bidirectional multi-mode hybrid energy storage circuit
A hybrid energy storage, multi-mode technology, applied in the direction of circuit devices, battery circuit devices, collectors, etc., can solve the problems of unfavorable high energy density and high power density, complex structure and control, high configuration cost, etc., to avoid frequent charging discharge, simple structure and low cost
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Embodiment 1
[0042] Energy-type energy storage element directly supplies power to the load mode: open the controllable switches K1, K2, K3, and close the switch K4.
[0043] When the hybrid energy storage system is applied to occasions that require energy recovery, the hybrid energy storage system should ensure that as much energy is recovered as possible to avoid waste. When the power type energy storage element is fully charged and energy recovery is no longer possible, power will be supplied to the energy type energy storage element. The hybrid energy storage system works in working mode 1, such as figure 2 As shown, in this mode, the controllable switches K1, K2, and K3 are disconnected, K4 is closed, and the bidirectional DC / DC converter stops working.
Embodiment 2
[0045] The power type energy storage element directly supplies power to the load mode: open the controllable switches K1, K2, K4, and close the switch K3.
[0046]When the hybrid energy storage system is applied to occasions that require energy recovery, the hybrid energy storage system should ensure that as much energy is recovered as possible to avoid waste. When the SOC of the power type energy storage element is high, the energy type energy storage element is not needed to charge the power type energy storage element through a bidirectional DC / DC converter. Combined power supply works in working mode 2, such as image 3 As shown, in this mode, the controllable switches K1, K2, and K4 are opened, K3 is closed, and the bidirectional DC / DC converter stops working.
Embodiment 3
[0048] The power type energy storage element supplies power to the load through a bidirectional DC / DC converter. Mode: open the controllable switches K1, K3, K4, and close the switch K2.
[0049] When the hybrid energy storage system is discharging, the working mode of the hybrid energy storage system is judged according to the typical characteristics of the load power demand. When the power demand of the load is not large and changes drastically, and the SOC of the power-type energy storage element is at a high level, the energy storage system works in working mode 3, such as Figure 4 shown. In this mode, the controllable switches K1, K3, K4 are open and K2 is closed. In this mode, the power-type energy storage element is solely responsible for the power demand of the load through the bidirectional DC / DC converter. Using the power-type energy storage, it has the ability to charge and discharge with high power in a short period of time. It can charge and discharge more times...
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