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CN-224233386-U - Prefill system and lawn mower

CN224233386UCN 224233386 UCN224233386 UCN 224233386UCN-224233386-U

Abstract

The utility model provides a pre-charging system and a mower, which comprise a capacitive load unit, a power supply module and a constant current module, wherein the capacitive load unit comprises a plurality of capacitive loads, the power supply module is respectively connected with each capacitive load through a plurality of first current paths and supplies power to the capacitive loads, and the constant current module is respectively connected with each capacitive load through a plurality of second current paths. According to the pre-charging system provided by the utility model, the power supply module is respectively connected with each capacitive load through the plurality of first current paths to supply power to the capacitive load, the constant current module is configured to output pre-charging current to the capacitive load through the second current paths, and the first current paths are configured to be conducted after the capacitive load is pre-charged, so that the pre-charging requirement of the plurality of capacitive loads is met by using one constant current module. Meanwhile, the constant current module is used for pre-charging, the pre-charging current is controllable, the pre-charging speed and the pre-charging efficiency can be greatly improved, and compared with the scheme of using the pre-charging resistor, the constant current module has lower loss.

Inventors

  • CHENG JINPENG
  • GENG SHIYAO
  • LAN BINCAI

Assignees

  • 宝时得科技（中国）有限公司

Dates

Publication Date
20260512
Application Date
20250324

Claims (10)

  1. 1. A priming system, comprising: a capacitive loading unit including a plurality of capacitive loads; The power supply module is respectively connected with each capacitive load through a plurality of first current paths and supplies power to the capacitive load; And the constant current module is respectively connected with each capacitive load through a plurality of second current paths, the constant current module is configured to output a precharging current to the capacitive load through the second current paths, and the first current paths are configured to be conducted after the capacitive load is precharged.
  2. 2. The priming system of claim 1, further comprising a third current path configured to be selectively turned on; The third current path is turned on to connect the constant current module and the second current path where the capacitive load is located, and the charge stored by the capacitive load is discharged via the second current path and the third current path.
  3. 3. The priming system of claim 1 or 2, wherein the power supply module comprises at least one power supply; When the power supply module comprises a plurality of power supplies, the power supplies are connected in parallel.
  4. 4. The priming system of claim 3, further comprising a plurality of first unidirectional conduction modules, each of said power sources being respectively connected to said constant current module by a corresponding one of said first unidirectional conduction modules, said first unidirectional conduction modules being configured to conduct in a direction from said power source to said constant current module and to turn off in a direction from said constant current module to said power source.
  5. 5. The priming system according to claim 1 or 2, wherein said constant current module is connected in parallel to a plurality of said first current paths.
  6. 6. The priming system of claim 1 or 2, further comprising a plurality of first switching modules and/or a plurality of second unidirectional conducting modules; Each capacitive load is connected with the power supply module through the corresponding first switch module, and each first switch module is used for switching on or switching off the corresponding first current path; Each capacitive load is connected with the constant current module through the corresponding second unidirectional conduction module, and the second unidirectional conduction module is configured to be conducted in the direction from the constant current module to the capacitive load and cut off in the direction from the capacitive load to the constant current module.
  7. 7. The pre-charge system according to claim 1 or 2, further comprising a plurality of second switch modules, each of the capacitive loads being connected to the constant current module by a corresponding second switch module, respectively, each of the second switch modules switching on or off the corresponding second current path.
  8. 8. The priming system according to claim 1 or 2, wherein the constant current module comprises a constant current control chip, or a constant current control circuit.
  9. 9. The priming system of claim 8, wherein the constant current control chip or constant current control circuit is provided with a current configuration port configured to receive an input signal for adjusting control current output capability.
  10. 10. A mower comprising a priming system as claimed in any one of claims 1 to 9.

Description

Prefill system and lawn mower Technical Field The application relates to the technical field of electric tools, in particular to a pre-charging system and a mower. Background With the development of science and technology, the self-mobile device is widely applied to work and life of people, such as an intelligent mower, an intelligent dust collector or an intelligent robot. Self-moving devices typically include capacitive loads, which are loads with capacitive characteristics. In the circuit, the voltage across the capacitor cannot jump. When a power supply is directly connected to a capacitive load, the capacitor is equivalent to a short circuit at the moment of switching on, and a large rush current is generated. The capacitive load pre-charge is to charge the capacitor with a small current before the main power supply is turned on, so that the voltage at two ends of the capacitor is gradually increased to be close to the power supply voltage, and the excessive impact current can be avoided when the main power supply is turned on formally. However, most of the capacitive load pre-charging schemes adopt pre-charging resistors, and have the problems of low pre-charging speed and low efficiency. Disclosure of utility model In view of the above, the present application aims to provide a priming system and a mower, which has a fast priming speed and a high priming efficiency. In order to achieve one of the above-disclosed objects, the present application provides a priming system comprising: a capacitive loading unit including a plurality of capacitive loads; The power supply module is respectively connected with each capacitive load through a plurality of first current paths and supplies power to the capacitive load; And the constant current module is respectively connected with each capacitive load through a plurality of second current paths, the constant current module is configured to output a precharging current to the capacitive load through the second current paths, and the first current paths are configured to be conducted after the capacitive load is precharged. In one embodiment, the precharge circuit further comprises a third current path configured to be selectively turned on; The third current path is turned on to connect the constant current module and the second current path where the capacitive load is located, and the charge stored by the capacitive load is discharged via the second current path and the third current path. As a further improvement of the embodiment of the present application, the power supply module includes at least one power supply; When the power supply module comprises a plurality of power supplies, the power supplies are connected in parallel. As a further improvement of the embodiment of the present application, the pre-charging system further includes a plurality of first unidirectional conduction modules, each of the power supplies is connected to the constant current module through a corresponding one of the first unidirectional conduction modules, and the first unidirectional conduction modules are configured to be turned on in a direction from the power supply to the constant current module and turned off in a direction from the constant current module to the power supply. As a further improvement of the embodiment of the present application, the constant current modules are connected to a plurality of the first current paths in parallel. As a further improvement of the embodiment of the present application, the pre-charging system further includes a plurality of first switch modules, each of the capacitive loads is connected to the power supply module through a corresponding one of the first switch modules, and each of the first switch modules turns on or off the corresponding one of the first current paths. As a further improvement of the embodiment of the present application, the pre-charging system further includes a plurality of second unidirectional conduction modules, each capacitive load is connected to the constant current module through a corresponding second unidirectional conduction module, and the second unidirectional conduction module is configured to be turned on in a direction from the constant current module to the capacitive load and turned off in a direction from the capacitive load to the constant current module. As a further improvement of the embodiment of the present application, the pre-charging system further includes a plurality of second switch modules, each of the capacitive loads is connected to the constant current module through a corresponding one of the second switch modules, and each of the second switch modules turns on or off a corresponding one of the second current paths. As a further improvement of the embodiment of the present application, the constant current module includes a constant current control chip, or a constant current control circuit. As a further improvement of the embodiment of the present application, the const