Charging circuit, charger with same, and charging method

Abstract

The invention discloses a charging circuit which comprises a power supply module, a control module and an overvoltage protection module, wherein the power supply module is used for charging a charged battery; the control module is used for controlling the power supply module to perform first-stage charging on the charged battery according to a pre-configured constant current parameter, and is also used for controlling the power supply module to perform second-stage charging on the charged battery according to a pre-configured constant voltage parameter after voltage for first-stage charging is compared with pre-configured voltage; and the overvoltage protection module is used for disconnecting the charging loop between the power supply module and the charged battery when the charging time of second-stage charging reaches preset charging time. According to the invention, the overvoltage protection module disconnects the charging loop between the power supply module and the charged battery when the charged battery is charged for preset charging time, thereby preventing the charged battery from being damaged due to overcharging, and improving the service performance and service life of the charged battery.

Description

technical field [0001] The invention relates to the technical field of battery charging, in particular to a charging circuit, a charger with the charging circuit and a charging method. Background technique [0002] As the country's environmental protection requirements increase, it has become an inevitable trend for lithium-ion power batteries to replace lead-acid power batteries in the electric moped industry. However, there are many shortcomings in the actual use of lithium-ion power batteries. For example, when charging lithium-ion power batteries, if the charging voltage is too high, it is easy to damage the battery, and even cause the battery to burn or explode. , and when charging, if the charging current is too large, the electrochemical reaction inside the battery will increase, the battery will heat up and cause energy loss, and the service life of the battery will be reduced. [0003] Therefore, under the prospect that lithium-ion power batteries become an inevita...

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Problems solved by technology

[0005] Aiming at the problem that the existing lithium-ion power battery chargers in the related art do not have the protection function for the lithium-ion power battery, and cannot effectively improve the service life of the lithium-ion power battery, the present invention proposes a charging circuit and a charger with the charging circuit. The advanced charger and charging method can ensure the safe charging of the rechargeable battery, and the damage caused by the rechargeable battery during charging can greatly improve the performance and service life of the rechargeable battery

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