一种基于开关电源的储能系统电气控制电路
By using an electrical control circuit for energy storage systems based on switching power supplies, the problems of low efficiency, large size, and high cost of existing UPS systems are solved, achieving efficient and low-cost power management and long-term backup power, and is suitable for electrical power control of energy storage systems.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU TIANHE ENERGY STORAGE CO LTD
- Filing Date
- 2025-08-15
- Publication Date
- 2026-07-17
AI Technical Summary
Existing energy storage systems using UPS suffer from problems such as low efficiency, large size, high cost, and frequent replacement of backup batteries.
The energy storage system adopts an electrical control circuit based on a switching power supply, including an energy storage unit, a battery control unit, a switching power supply, and a load. It uses a switching power supply to replace the UPS, adopts a dual-input design, prioritizes AC power, and switches to DC power supply to achieve seamless switching. Combined with positive and negative circuit control circuits and bypass control circuits, it improves power efficiency and backup time.
It improved energy efficiency, reduced equipment size, lowered costs, extended backup power time, reduced maintenance costs, and ensured stable power supply for critical equipment.
Smart Images
Figure CN224520751U_ABST
Abstract
Claims
1. A switched power supply based energy storage system electrical control circuit, characterized in that, include: Energy storage unit, battery control unit, switching power supply and load; The AC input terminal of the switching power supply is connected to the mains power, the DC input terminal of the switching power supply is connected to the energy storage unit, and the output terminal of the switching power supply is connected to the battery control unit and the load. The energy storage unit includes multiple DC power supply units. Each DC power supply unit includes a battery cluster and a positive and negative circuit control circuit and a bypass control circuit connected between the battery cluster and the switching power supply. The battery cluster in each DC power supply unit is connected to the DC bus through the positive and negative circuit control circuit, and the battery cluster in each DC power supply unit is connected to the DC input terminal of the switching power supply through the bypass control circuit.
2. The switched power supply based energy storage system electrical control circuit of claim 1, wherein, The positive and negative circuit control circuit includes a first relay, a second relay, and an isolating switch; the bypass control circuit includes a third relay and multiple diodes. The negative terminal of the battery cluster is connected to the negative terminal of the DC bus via the first relay and the disconnect switch, and the positive terminal of the battery cluster is connected to the positive terminal of the DC bus via the second relay and the disconnect switch; The negative terminal of the battery cluster is also connected to the DC input terminal of the switching power supply via a diode, and the positive terminal of the battery cluster is also connected to the DC input terminal of the switching power supply via the third relay and a diode; the battery clusters connected hand in hand form a parallel circuit by connecting two diodes between the positive terminals and two diodes between the negative terminals respectively.
3. The switched power supply based energy storage system electrical control circuit of claim 2, wherein, The positive and negative circuit control circuit further includes a current sensor connected between the negative terminal of the battery cluster and the first relay, and a fuse connected between the positive terminal of the battery cluster and the second relay; and / or the bypass control circuit further includes a current-limiting resistor connected between the third relay and the DC input terminal of the switching power supply.
4. The switched power supply based energy storage system electrical control circuit of claim 1, wherein, Each DC power supply unit also includes a battery control unit, and the output terminal of the switching power supply is also connected to the battery control unit.
5. The switched power supply based energy storage system electrical control circuit of claim 1, wherein, When the output terminal of the switching power supply is used to output AC power, the electrical control circuit of the energy storage system further includes an AC-to-DC unit connected between the output terminal of the switching power supply and the battery control unit; when the output terminal of the switching power supply is used to output DC power, the electrical control circuit of the energy storage system further includes a DC-to-AC unit connected between the output terminal of the switching power supply and the load.
6. The switched power supply based energy storage system electrical control circuit of claim 5, wherein, The switching power supply includes a first circuit structure and / or a second circuit structure. The inputs of both the first circuit structure and the second circuit structure include DC input and AC input. The output of the first circuit structure is AC power, and the output of the second circuit structure is DC power.
7. The switched power supply based energy storage system electrical control circuit of claim 6, wherein, The first circuit structure includes a boost circuit, a half-bridge inverter circuit, a buck rectifier circuit, a full-bridge inverter circuit, and an AC filter output circuit; the second circuit structure includes a buck circuit, a half-bridge inverter circuit, a buck rectifier circuit, and a DC filter output circuit.
8. The switched power supply based energy storage system electrical control circuit of claim 1, wherein, Both the DC input terminal and the output terminal of the switching power supply are equipped with circuit breakers.
9. The switched power supply based energy storage system electrical control circuit of claim 1, wherein, The AC input terminal of the switching power supply is connected to the mains power through a fourth relay and an automatic transfer switch.
10. The electrical control circuit for an energy storage system based on a switching power supply according to claim 1, characterized in that, The electrical control circuit of the energy storage system also includes a temperature and humidity sensor connected to the switching power supply.