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CN-224218118-U - Charging module and charging system

CN224218118UCN 224218118 UCN224218118 UCN 224218118UCN-224218118-U

Abstract

The application discloses a charging module and a charging system, and relates to the technical field of charging. The charging module comprises an AC conversion circuit and at least one group of DC conversion circuits connected with the AC conversion circuit, wherein the DC conversion circuit comprises an output electrolysis module, an anti-reflection module and a discharging absorption module, the discharging absorption module comprises a first discharging unit, a second discharging unit, a discharging switch unit and an absorption unit, the first discharging unit and the second discharging unit are connected in series and then connected between a first node and a second node in parallel, one end of the absorption unit is connected between the anti-reflection module and a load, the other end of the absorption unit is connected between the first discharging unit and the second discharging unit, the discharging switch unit is connected between the second discharging unit and the second node, the first discharging unit and the second discharging unit are both composed of resistors, and the absorption unit is composed of capacitors. Therefore, the discharging resistor is shared as the absorbing resistor, and the cost of the charging module is reduced.

Inventors

  • FAN YANGPING
  • WANG LIQIANG

Assignees

  • 领充新能源科技有限公司

Dates

Publication Date
20260508
Application Date
20250427

Claims (10)

  1. 1. A charging module, comprising an AC conversion circuit and at least one set of DC conversion circuits connected to the AC conversion circuit, the DC conversion circuit comprising an output electrolysis module, an anti-reflection module and a discharge absorption module; One end of the anti-reflection module is connected with one end of the output electrolysis module and forms a first node, the other end of the anti-reflection module is connected with a load, and the other end of the output electrolysis module is connected with the load and forms a second node; The discharging absorption module comprises a first discharging unit, a second discharging unit, a discharging switch unit and an absorption unit, wherein the first discharging unit and the second discharging unit are connected in series and then connected between the first node and the second node in parallel, one end of the absorption unit is connected between the anti-reflection module and the load, the other end of the absorption unit is connected between the first discharging unit and the second discharging unit, the discharging switch unit is connected between the second discharging unit and the second node, the first discharging unit and the second discharging unit are both composed of resistors, and the absorption unit is composed of capacitors.
  2. 2. The charging module of claim 1, wherein the first discharge cell comprises a first resistor and the second discharge cell comprises a second resistor; One end of the first resistor is connected with the first node, the other end of the first resistor is connected with one end of the second resistor, and the other end of the second resistor is connected with the discharge switch unit.
  3. 3. The charging module of claim 2, wherein the absorption unit comprises a first capacitance; One end of the first capacitor is connected between the anti-reflection module and the load, and the other end of the first capacitor is connected between the first resistor and the second resistor.
  4. 4. A charging module according to any one of claims 1 to 3, wherein the discharge switching unit comprises a switching tube; and two ends of the switching tube are respectively connected with the second discharging unit and the second node.
  5. 5. A charging module according to any one of claims 1 to 3, wherein the output electrolysis module comprises a second capacitance, a third capacitance and a first inductance; One end of the second capacitor is connected with one end of the primary coil in the first inductor, the other end of the second capacitor is connected with one end of the third capacitor, the other end of the third capacitor is connected with the other end of the primary coil in the first inductor, and the secondary side of the first inductor is connected between the first node and the second node.
  6. 6. A charging module according to any one of claims 1 to 3, wherein the anti-reflection module comprises at least one anti-reflection diode; in the case that the anti-reflection module includes one of the anti-reflection diodes, an anode of the anti-reflection diode is connected to the first node, and a cathode of the anti-reflection diode is connected to the load; In the case that the anti-reflection module includes two anti-reflection diodes, an anode of one of the anti-reflection diodes is connected to the first node, a cathode of the other anti-reflection diode is connected to an anode of the other anti-reflection diode, and a cathode of the other anti-reflection diode is connected to the load.
  7. 7. The charging module of claim 5, wherein the DC conversion circuit further comprises a first transformer, a second transformer, a first rectifying unit, and a second rectifying unit; the primary side of the first transformer is connected with the AC conversion circuit, the secondary side of the first transformer is connected with the first rectifying unit, the first output end of the first rectifying unit is connected with one end of the second capacitor, and the second output end of the first rectifying unit is connected between the second capacitor and the third capacitor; The primary side of the second transformer is connected with the AC conversion circuit, the secondary side of the second transformer is connected with the second rectifying unit, the first output end of the second rectifying unit is connected between the second capacitor and the third capacitor, and the second output end of the second rectifying unit is connected with one end of the third capacitor.
  8. 8. The charging module of claim 7, wherein the first rectifying unit comprises a first diode, a second diode, a third diode, and a fourth diode; the anode of the first diode is connected with the cathode of the second diode to serve as an input end of the first rectifying unit, the anode of the third diode is connected with the cathode of the fourth diode to serve as another input end of the first rectifying unit, the cathode of the first diode is connected with the cathode of the third diode to serve as a first output end of the first rectifying unit, and the anode of the second diode is connected with the anode of the fourth diode to serve as a second output end of the first rectifying unit; The second rectifying unit comprises a fifth diode, a sixth diode, a seventh diode and an eighth diode; The anode of the fifth diode is connected with the cathode of the sixth diode to serve as an input end of the second rectifying unit, the anode of the seventh diode is connected with the cathode of the eighth diode to serve as another input end of the second rectifying unit, the cathode of the fifth diode is connected with the cathode of the seventh diode to serve as a first output end of the second rectifying unit, and the anode of the sixth diode is connected with the anode of the eighth diode to serve as a second output end of the second rectifying unit.
  9. 9. The charging module of claim 7, wherein the DC conversion circuit further comprises a switching module comprising a first switching unit and a second switching unit; The first switch unit is connected in parallel between the first output end of the first rectifying unit and the first output end of the second rectifying unit; The second switching unit is connected in parallel between the second output terminal of the first rectifying unit and the second output terminal of the second rectifying unit.
  10. 10. A charging system comprising at least one charging module according to any one of claims 1 to 9.

Description

Charging module and charging system Technical Field The present application relates to the field of charging technologies, and in particular, to a charging module and a charging system. Background In the charging module, due to the switching of a battery load, the switching action of a switch may cause oscillation and voltage spike on the anti-reflection diode, and the excessively high voltage spike may cause the anti-reflection diode to fail, so that the safety performance of the charging pile is affected, and therefore, the key technology of absorbing output surge and suppressing circuit oscillation is used for guaranteeing the safe and stable operation of a system. The existing solution is to introduce a separate RC snubber circuit in the charging module to absorb the voltage spike on the anti-reflection diode and suppress the oscillation, but the introduction of additional devices can significantly increase the system cost. Disclosure of utility model The application mainly aims to provide a charging module and a charging system, so that the discharging resistor is shared as an absorbing resistor, and the cost of the charging module is reduced. In order to achieve the above object, the present application provides a charging module, including an AC conversion circuit and at least one set of DC conversion circuits connected to the AC conversion circuit, the DC conversion circuits including an output electrolysis module, an anti-reflection module, and a discharge absorption module; One end of the anti-reflection module is connected with one end of the output electrolysis module and forms a first node, the other end of the anti-reflection module is connected with a load, and the other end of the output electrolysis module is connected with the load and forms a second node; The discharging absorption module comprises a first discharging unit, a second discharging unit, a discharging switch unit and an absorption unit, wherein the first discharging unit and the second discharging unit are connected in series and then connected between the first node and the second node in parallel, one end of the absorption unit is connected between the anti-reflection module and the load, the other end of the absorption unit is connected between the first discharging unit and the second discharging unit, the discharging switch unit is connected between the second discharging unit and the second node, the first discharging unit and the second discharging unit are both composed of resistors, and the absorption unit is composed of capacitors. Optionally, the first discharging unit comprises a first resistor, the second discharging unit comprises a second resistor, one end of the first resistor is connected with the first node, the other end of the first resistor is connected with one end of the second resistor, and the other end of the second resistor is connected with the discharging switch unit. Optionally, the absorption unit comprises a first capacitor, one end of the first capacitor is connected between the anti-reflection module and the load, and the other end of the first capacitor is connected between the first resistor and the second resistor. Optionally, the discharging switch unit comprises a switch tube, and two ends of the switch tube are respectively connected with the second discharging unit and the second node. Optionally, the output electrolysis module comprises a second capacitor, a third capacitor and a first inductor, wherein one end of the second capacitor is connected with one end of a primary coil in the first inductor, the other end of the second capacitor is connected with one end of the third capacitor, the other end of the third capacitor is connected with the other end of the primary coil in the first inductor, and a secondary side of the first inductor is connected between the first node and the second node. Optionally, the anti-reflection module comprises at least one anti-reflection diode, wherein in the case that the anti-reflection module comprises one anti-reflection diode, the anode of the anti-reflection diode is connected with the first node, the cathode of the anti-reflection diode is connected with the load, in the case that the anti-reflection module comprises two anti-reflection diodes, the anode of one anti-reflection diode is connected with the first node, the cathode of the other anti-reflection diode is connected with the anode of the other anti-reflection diode, and the cathode of the other anti-reflection diode is connected with the load. Optionally, the DC conversion circuit further comprises a first transformer, a second transformer, a first rectifying unit and a second rectifying unit, wherein the primary side of the first transformer is connected with the AC conversion circuit, the secondary side of the first transformer is connected with the first rectifying unit, the first output end of the first rectifying unit is connected with one end of the second capacitor, the second o