March 18, 2019 at 06:59How I tried to defeat TP4056
Greetings!
A few words about the popular module for charging lithium batteries based on the TP4056 controller.
Some time ago, Chinese brothers began to produce modules for charging li-on cells based on the TP4056 chip. At first it was just charge modules, with the first options being released with a MiniUSB connector. Then they began to install MicroUSB. The latest versions of this module come with built-in battery protection based on the DW01 (protection against short circuit, overdischarge).
So here.
These are small modules for embedding in various equipment, mainly for DIY (DIY) and repair. It is extremely convenient for replacing almost any salt and alkaline batteries: AA, AAA, D, Krona batteries, and so on, the main requirement is that the battery “draw out” the required parameters. As a rule, lithium cells are an order of magnitude more powerful than the same salt AA batteries.
Appearance of the charging module on TP4056
Such "upgrades" usually come either from hopelessness (there are no elements on sale, the hardware design is obsolete, but it is necessary to use it), or with increased battery consumption. For example, in children's toys, either Ni-Cd batteries (4-5 cells of 1.2V each) or AA batteries, 5-6 pieces, are used. It would be convenient if all these toys, multimeters and other equipment at work would not be powered by batteries, but charged from common USB.
The picture below shows: the first version of the board (with MiniUSB), with the designation of the main functional nodes, the second version of the board (with MicroUSB and protection). Pay attention to Rprog / R3. Using this resistor, you can set the battery charging current. On the right is a table for selecting the value of this resistor.
I tried to “modify” the circuit, modifying the module for parallel connection of modules, adding diodes for decoupling the supply circuits to the circuit, combined tracks, etc. An attempt of such improvements led to the fact that it is possible to connect 2-3 modules together to charge a 2S (or 3S) battery, but when the protection is activated on one of them, the current flowing through the other elements increases and can lead to failure other modules.
So, I conclude that such modules are not suitable for combination and parallel connection of type 2S-3S. There is another way. This module can work well with 1S2P (1S3P ...) battery cells, for example, 18650. And to get the desired voltage at the output, it is better to use the Step-Up DC-DC module of the required power.
Just connect to the module output on the TP4056 Step-Up DC-DC (they come in a fixed output, and with an adjustable output). A similar module in the photo has an output of up to 2A and an adjustable voltage.
In the photo, the module with Step-Up and battery 08570 from an electronic cigarette.
I plan to install such an assembly in a multimeter to replace the 9V Krona battery. Minus - you have to “gash” out the MicroUSB connector to charge the device.
To replace 5 Ni-Cd cells on the converter, 6.0V can be installed. Similar assemblies are used in old r / u toys and not only.
But to replace the three AA or AAA batteries set 4.5V. These are the most common cases of using such a module.
TP4056 Charge Controller Module + Battery Protection BW01(5 pieces per lot) I took with a DIY3M coupon, the price of something there is about $ 2. So far, all the boards have dispersed across devices, but for the 2S ... 3S options it is better to look for specialized BMS modules with balancing and protection.
A few words about the popular module for charging lithium batteries based on the TP4056 controller.
Some time ago, Chinese brothers began to produce modules for charging li-on cells based on the TP4056 chip. At first it was just charge modules, with the first options being released with a MiniUSB connector. Then they began to install MicroUSB. The latest versions of this module come with built-in battery protection based on the DW01 (protection against short circuit, overdischarge).
So here.
These are small modules for embedding in various equipment, mainly for DIY (DIY) and repair. It is extremely convenient for replacing almost any salt and alkaline batteries: AA, AAA, D, Krona batteries, and so on, the main requirement is that the battery “draw out” the required parameters. As a rule, lithium cells are an order of magnitude more powerful than the same salt AA batteries.
Appearance of the charging module on TP4056
Such "upgrades" usually come either from hopelessness (there are no elements on sale, the hardware design is obsolete, but it is necessary to use it), or with increased battery consumption. For example, in children's toys, either Ni-Cd batteries (4-5 cells of 1.2V each) or AA batteries, 5-6 pieces, are used. It would be convenient if all these toys, multimeters and other equipment at work would not be powered by batteries, but charged from common USB.
The picture below shows: the first version of the board (with MiniUSB), with the designation of the main functional nodes, the second version of the board (with MicroUSB and protection). Pay attention to Rprog / R3. Using this resistor, you can set the battery charging current. On the right is a table for selecting the value of this resistor.
I tried to “modify” the circuit, modifying the module for parallel connection of modules, adding diodes for decoupling the supply circuits to the circuit, combined tracks, etc. An attempt of such improvements led to the fact that it is possible to connect 2-3 modules together to charge a 2S (or 3S) battery, but when the protection is activated on one of them, the current flowing through the other elements increases and can lead to failure other modules.
So, I conclude that such modules are not suitable for combination and parallel connection of type 2S-3S. There is another way. This module can work well with 1S2P (1S3P ...) battery cells, for example, 18650. And to get the desired voltage at the output, it is better to use the Step-Up DC-DC module of the required power.
Just connect to the module output on the TP4056 Step-Up DC-DC (they come in a fixed output, and with an adjustable output). A similar module in the photo has an output of up to 2A and an adjustable voltage.
In the photo, the module with Step-Up and battery 08570 from an electronic cigarette.
I plan to install such an assembly in a multimeter to replace the 9V Krona battery. Minus - you have to “gash” out the MicroUSB connector to charge the device.
To replace 5 Ni-Cd cells on the converter, 6.0V can be installed. Similar assemblies are used in old r / u toys and not only.
But to replace the three AA or AAA batteries set 4.5V. These are the most common cases of using such a module.
TP4056 Charge Controller Module + Battery Protection BW01(5 pieces per lot) I took with a DIY3M coupon, the price of something there is about $ 2. So far, all the boards have dispersed across devices, but for the 2S ... 3S options it is better to look for specialized BMS modules with balancing and protection.