So your Lipo pack will have a max charging voltage that you can apply to it. If your voltage at the pack spikes to above that max charging voltage then that's bad. The pack should also have a max charging current, try to stay under that as well. So long as you stay within those bounds, reverse current is just free charging of the battery.
Almost always though an inductive kick from something that draws 10A is going to go way higher than the pack max charge voltage for just long enough to be a problem to the rest of the electronics. It's very common practice to put a kick-back protection diode for this reason (basically just a diode wired at the output of the bridge in parallel with the load that is oriented to not conduct during the time that you provide power to the load).
You could also put a tvs protection diode there with a breakdown voltage just under the problematic voltage, so long as it's rated to handle the energy.
So your Lipo pack will have a max charging voltage that you can apply to it. If your voltage at the pack spikes to above that max charging voltage then that's bad. The pack should also have a max charging current, try to stay under that as well. So long as you stay within those bounds, reverse current is just free charging of the battery.
Almost always though an inductive kick from something that draws 10A is going to go way higher than the pack max charge voltage for just long enough to be a problem to the rest of the electronics. It's very common practice to put a kick-back protection diode for this reason (basically just a diode wired at the output of the bridge in parallel with the load that is oriented to not conduct during the time that you provide power to the load).
You could also put a tvs protection diode there with a breakdown voltage just under the problematic voltage, so long as it's rated to handle the energy.