Difference between revisions of "Ryobi40V"

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(Created page with "This is a basic analysis of how a Ryobi 40V smart charger (model number OP403) communicates with the battery's BMS to enable the charging FET. ==Electronics== Pictures of the...")
 
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Charging Sequence:
 
Charging Sequence:
[[File:Ryobi_40VChg_Sequence_Main.jpg|thumb|center|400px|Battery insertion to charging start sequence.]]
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[[File:Ryobi_40VChg_Sequence_Main.png|thumb|center|400px|Battery insertion to charging start sequence.]]
  
 
Data detail:
 
Data detail:
[[File:Ryobi_40VChg_Packet.jpg|thumb|center|400px|Data packet detail.]]
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[[File:Ryobi_40VChg_Packet.png|thumb|center|400px|Data packet detail.]]
  
 
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The charger includes a 5V 1.5A buck based on a MP2487 (4.5-55V in, 220mOhm PFET, 1.5A max). The sticker claims 5V 2.1A output.
 
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==Photos==
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<gallery widths=180px heights=120px perrow=4>
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File:CCR_v1_Regen.jpg|CCR v1 prototype in regenerative configuration
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File:CCR_v1_Regen.jpg|...
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</gallery>
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Revision as of 20:19, 12 August 2019

This is a basic analysis of how a Ryobi 40V smart charger (model number OP403) communicates with the battery's BMS to enable the charging FET.

Electronics

Pictures of the charger PCB are below:

PCB top side.
PCB bottom side.

The wall wart adapter is a 42V 1.5A rated switching converter, listed at 84W max from AC (though output is max 63W). The wall wart does the necessary CC/CV current limiting, with a ~44.2V open circuit voltage output when no battery is connected. Output is switched to the battery though a MOSFET.

Charging Sequence:

Battery insertion to charging start sequence.

Data detail:

Data packet detail.

The charger includes a 5V 1.5A buck based on a MP2487 (4.5-55V in, 220mOhm PFET, 1.5A max). The sticker claims 5V 2.1A output.