TP4056 module keeps needing activation

Projects General Guidance
1

Hi,

I am using a TP4056 module for charging and protecting a 18650 li ion battery. The supplier states that I need to connect an input on the charging circuit to activate the battery protection circuit.

I provided an input to the charger then removed it; and then the project powered on. However after powering off the project and turning it on after a while the project does not power up anymore. I tried connecting power to the charging circuit then removed it and the project powers up.

How come I need to keep activating the battery protection circuit? I thought I only have to do it once unless I disconnected the battery then connected it.

Thanks.

1 Like
2

Even if You're not designing space or military devices schematics and links to the components, devices, are needed.

3

I just read the datasheet for the IC.

And guess what? A schematic of your circuit is necessary to proceed.

a7

4

The TP4056 is just a charger IC, so the battery protection bits must be coming from other components.

Some modules that use the TP4056 do not have battery protection bits.

5

Maybe your load is triggering the protection?

6

My bad.

Link to the online listing; I am using the "Type-c with protection"
Here

Schematic:

Capture
Capture726×539 31.1 KB

7

Hmm, I doubt that as it works after I turn it off and on for a few times; it's when I leave it off for a while then try to turn it on it does not power up.

8

What's the current rating of the motor?

9

I tried searching the markings on the motor with no luck getting any info.
Here is an image of the motor markings:

PXL_20210911_124156099
PXL_20210911_1241560991920×3413 641 KB

10

Then you cannot know if the TP40thingy can properly supply the motor current.

11

Tested using my bench power supply; and the motor draws a little over 1A (1070mA) at 3.6V.

12

Include stall current and the TPthingy is rated for how many amps?

13

The listing states that the over current protection activates at 3A. I thought about stall current; but I don't know how to measure it.

Edit:
Complete stall current is 6.2A; measured by observing the current value on my bench power supply while holding the motor shaft in place.

14

Will the tp-thingy supply 6.2A or are you asking for trouble by supplying power to a motor?

15

So the issue is just the initial inrush current?

16

OK, well I thought there may be a relation to the current requirements of the motor to the

problem.

17

Who knows? There are many things wrong with what you are trying to do, and drawing FAR too much current at startup is just the most obvious problem.

The "schematic" you posted is useless. Motors require a motor driver, with inductive kick suppression.

18

What's wrong with the schematic? Why do I need a motor driver?

19

The TP4056 is not designed to be used with a motor.

Start over.

20

Thing is I disposed of all the electronics that came with it (the electric shaver, that is what the project is). How should I approach this issue? What I need is a charging and protection circuit; and a way to power the motor from the battery, correct? Cheers

Edit:
I checked on AliExpress and they sell the motherboards for it. A bit pricey though, and delivery delay; I would like to come up with a custom solution. The shaver I'm trying to fix is the Wahl 8591.