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Design of charging circuit and protection circuit of lithium ion battery

06 Jul 2020 - lithium ion battery lithium ion battery charging circuit lithium ion battery protection circuit
With the widespread application of handheld devices, more and more electronic products flood the streets, and lithium ion battery has become the focus of technology. Most of the handheld devices are powered by lithium ion battery, and the safety of lithium ion battery has become the focus. Here is a summary of how to design the lithium-ion battery charging circuit and protection circuit.

Lithium - ion battery 'base
Lithium ion battery are rechargeable, and most lithium-ion batteries have a full charge of 4.2V and other Voltages. Lithium ion battery capacity is xxxmAh, such as 1000mAh,1000mA Supply current can be used for 1 hour. The 500mA power supply lasts for 2 hours.And so on.
Li-ion Polymer Battery
Life and charging mode of lithium-ion batteries
It is the limit of the number of times that it is fully filled with emission.
Charging mode: fast charging, slow charging, trickling charging, constant current charging, etc.
Issues to be noted in circuit design of lithium ion battery:
Overcharge and over discharge of lithium-ion batteries will affect the battery life.
Pay attention to the charging voltage and current of lithium-ion batteries.Then select the appropriate charging chip.
Pay attention to prevent lithium ion battery overcharge, overdischarge, short circuit protection and other problems.
Li-ion Battery
Pay attention to the charging voltage and current of lithium-ion batteries. Then select the appropriate charging chip.
Pay attention to prevent lithium ion battery overcharge, overdischarge, short circuit protection and other problems.
After the design goes through a lot of testing.
Design of charging circuit of lithium ion battery
The chip Tp4056 was selected as the example. The maximum charging current can be controlled according to the resistance. You can design the charging indicator light. You can design the charging temperature to charge the battery.

Charging protection circuit, choose the combination of chip DW01 and GTT8205, can achieve short circuit protection, over-charge and over-discharge protection.

LiFePo4 Battery

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