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CN-224218124-U - Charging circuit of energy storage system and energy storage system

CN224218124UCN 224218124 UCN224218124 UCN 224218124UCN-224218124-U

Abstract

The utility model provides a charging circuit of an energy storage system and the energy storage system, wherein the charging circuit of the energy storage system comprises a pre-charging switch, a discharging switch, a pre-charging resistor, a first capacitor, a bypass switch and a bypass switch, wherein the first end of the pre-charging switch is connected with the first end of an input circuit, the first end of the discharging switch is connected with the second end of the input circuit, the first end of the pre-charging resistor is respectively connected with the second end of the pre-charging switch and the second end of the discharging switch, the first end of the first capacitor is connected with the second end of the pre-charging resistor, the second end of the first capacitor is respectively connected with the first end of the discharging switch and the second end of the input circuit, and the first end of the bypass switch is connected with the first end of the first capacitor. The utility model reduces the number of circuit devices, reduces the occupied area of the PCB (Printed Circuit Board ), and further reduces the cost.

Inventors

  • JIA ZHENG
  • SUN ZHONGWEI

Assignees

  • 深圳市华宝新能源股份有限公司

Dates

Publication Date
20260508
Application Date
20250423

Claims (10)

  1. 1. A charging circuit for an energy storage system, comprising: the first end of the precharge switch is connected with the first end of the input circuit; The first end of the discharge switch is connected with the second end of the input circuit; the first end of the pre-charging resistor is respectively connected with the second end of the pre-charging switch and the second end of the discharging switch; The first end of the first capacitor is connected with the second end of the pre-charging resistor, and the second end of the first capacitor is respectively connected with the first end of the discharging switch and the second end of the input circuit; The first end of the bypass switch is connected with the first end of the input circuit, and the second end of the bypass switch is connected with the first end of the first capacitor; The discharging switch, the pre-charging resistor and the first capacitor form a discharging circuit, and the pre-charging switch and the pre-charging resistor form a pre-charging circuit.
  2. 2. The charging circuit of an energy storage system of claim 1, wherein the charging circuit of the energy storage system further comprises: The anti-reverse circuit is characterized in that a first end of the anti-reverse circuit is connected with the first end of the input circuit, and a second end of the anti-reverse circuit is connected with the first end of the pre-charging switch.
  3. 3. The charging circuit of the energy storage system of claim 2, wherein the charging circuit comprises a capacitor, When the first end of the input circuit is a positive electrode and the second end of the input circuit is a negative electrode, the anti-reflection circuit is in a conducting state, the pre-charging switch is in a conducting state, the input circuit pre-charges the first capacitor through the anti-reflection circuit, the pre-charging switch and the pre-charging resistor, when the difference value between the voltage value of the input circuit and the voltage values at two ends of the first capacitor is within a preset range, the bypass switch is in a closed state, the pre-charging switch is in an open state, and the input circuit charges the first capacitor through the bypass switch; When the input circuit stops outputting energy, the bypass switch is in an open state, the discharge switch is in a closed state, and the first capacitor discharges through the discharge switch and the precharge resistor.
  4. 4. The charging circuit of the energy storage system of claim 2, wherein the charging circuit comprises a capacitor, When the first end of the input circuit is a negative electrode and the second end of the input circuit is a positive electrode, the pre-charging switch is in a conducting state, the anti-reflection circuit is in a cut-off state, and the input circuit cannot pre-charge the first capacitor.
  5. 5. The charging circuit of an energy storage system according to any one of claims 1 to 4, wherein the precharge resistor comprises: The first end of the first resistor is connected with the pre-charge switch and the discharge switch respectively; And the first end of the second resistor is connected with the second end of the first resistor, and the second end of the second resistor is connected with the first end of the first capacitor.
  6. 6. The charging circuit of the energy storage system of claim 5, wherein the precharge switch comprises: and the first end of the first relay is connected with the first end of the input circuit, and the second end of the first relay is connected with the first end of the first resistor.
  7. 7. The charging circuit of the energy storage system of claim 6, wherein the discharge switch comprises: And the drain electrode of the first switching tube is respectively connected with the first end of the first resistor and the second end of the first relay, and the source electrode of the first switching tube is connected with the second end of the input circuit.
  8. 8. The charging circuit of the energy storage system of claim 7, wherein the bypass switch comprises: And the first end of the second relay is connected with the first end of the input circuit, and the second end of the second relay is respectively connected with the second end of the second resistor and the first end of the first capacitor.
  9. 9. The charging circuit of the energy storage system of claim 2, wherein the anti-reflection circuit comprises: The positive electrode of the first diode is connected with the first end of the input circuit, and the negative electrode of the first diode is connected with the first end of the pre-charging switch.
  10. 10. An energy storage system, the energy storage system comprising: A charging circuit of an energy storage system according to any one of claims 1 to 9.

Description

Charging circuit of energy storage system and energy storage system Technical Field The utility model relates to the technical field of electric power, in particular to a charging circuit of an energy storage system and the energy storage system. Background In the related art, most of the charging circuits of the energy storage system are pre-charging circuits, anti-reflection circuits and discharging circuits are separately arranged, that is, the pre-charging circuits, the anti-reflection circuits and the discharging circuits are respectively provided with independent circuits, however, in the scheme, the problems of more circuit devices, large occupied area of a PCB (Printed Circuit Board ), high cost and the like exist. Disclosure of utility model The present utility model aims to solve at least one of the technical problems existing in the prior art or related art. To this end, a first aspect of the utility model proposes a charging circuit of an energy storage system. A second aspect of the present utility model provides an energy storage system. In view of this, according to a first aspect of the present utility model, a charging circuit of an energy storage system is provided, which comprises a pre-charge switch, a discharge switch, a pre-charge resistor, a first capacitor, a bypass switch and a bypass switch, wherein the first end of the pre-charge switch is connected with the first end of the input circuit, the first end of the discharge switch is connected with the second end of the input circuit, the pre-charge resistor is connected with the second end of the pre-charge switch and the second end of the discharge switch respectively, the first end of the first capacitor is connected with the second end of the pre-charge resistor, the second end of the first capacitor is connected with the first end of the discharge switch and the second end of the input circuit respectively, and the first end of the bypass switch is connected with the first end of the first capacitor. The charging circuit of the energy storage system mainly comprises a pre-charging switch, a discharging switch, a pre-charging resistor, a first capacitor and a bypass switch. The first end of the pre-charging switch is connected with the first end of the input circuit, the second end of the pre-charging switch is connected with the first end of the pre-charging resistor, the second end of the pre-charging resistor is connected with the first end of the first capacitor, and the second end of the first capacitor is connected with the second end of the input circuit, namely, the pre-charging switch and the pre-charging resistor can form a pre-charging circuit. Further, a first end of the bypass switch is connected to the first end of the input circuit, and a second end of the bypass switch is connected to the first end of the first capacitor. Further, the first end of the discharge switch is connected to the second end of the input circuit, and the second end of the discharge switch is connected to the second end of the pre-charge resistor, that is, the discharge switch, the pre-charge resistor and the first capacitor form a discharge circuit. In the utility model, the discharging circuit and the pre-charging circuit share the same resistor, namely the pre-charging resistor, thereby reducing the number of circuit devices, reducing the occupied area of a PCB (Printed Circuit Board, a printed circuit board) and further reducing the cost. In some embodiments, optionally, the charging circuit of the energy storage system further comprises an anti-reflection circuit, wherein a first end of the anti-reflection circuit is connected with the first end of the input circuit, and a second end of the anti-reflection circuit is connected with the first end of the pre-charging switch. In the technical scheme, the charging circuit of the energy storage system further comprises an anti-reflection circuit. The first end of the anti-reflection circuit is connected with the first end of the input circuit, and the second end of the anti-reflection circuit is connected with the first end of the pre-charging switch. By arranging the anti-reverse circuit between the first end of the input circuit and the first end of the pre-charging switch, when the positive electrode and the negative electrode of the input circuit are connected reversely with the pre-charging switch, the charging circuit of the energy storage system cannot work, so that the situations that the port electrolytic capacitor leaks and bulges and the circuit device is damaged due to the reverse connection of the positive electrode and the negative electrode of the input circuit are avoided. In some technical schemes, optionally, when the first end of the input circuit is a positive electrode and the second end of the input circuit is a negative electrode, the anti-reflection circuit is in a conducting state, the pre-charge switch is in a conducting state, the input circuit pre-charges the first