Charging circuit of super-capacitor
A technology of super capacitor and charging circuit, which is applied in battery circuit devices, circuit devices, safety/protection circuits, etc. Effect
Inactive Publication Date: 2019-04-19
ZHEJIANG HECHUAN TECH
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[0003] In the existing supercapacitor charging circuit, one is to charge the supercapacitor in the way of constant current charging, but this kind of charging circuit will make the electrode voltage of the supercapacitor exceed the supercapacitor voltage in the later stage of charging the supercapacitor. The rated voltage value of the supercapacitor will cause the electrolyte in the supercapacitor to precipitate bubbles and appear in a boiling state, which will easily cause the supercapacitor to be scrapped in advance; the other is to charge the supercapacitor by constant voltage charging, but this kind of charging In the early stage of charging the supercapacitor, the charging current will exceed the maximum current of the electrode of the supercapacitor, which will easily cause the plate of the supercapacitor to bend, thus affecting the service life of the supercapacitor
In summary, the existing supercapacitor charging circuit will cause abnormalities in the charging process of the supercapacitor, which will affect the performance of the supercapacitor
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[0054] As a preferred implementation manner, the above charging circuit further includes: MCU;
[0055] Among them, MCU is connected with EN pin of TPS61087.
[0056] In practical applications, the EN pin of the TPS61087 can also be directly connected to an MCU (Microcontroller Unit, Micro Control Unit), so that the MCU can flexibly adjust the voltage value of the target supercapacitor during the charging process. That is to say, the MCU monitors the voltage value of the target supercapacitor in real time, and after the analysis and processing by the MCU, the corresponding PWM control signal is obtained to control the opening and closing of each switch tube in the charging circuit, and use this to control the target supercapacitor. Capacitor charging current is adjusted. Therefore, in this way, the flexibility in the process of charging the target supercapacitor can be further improved.
[0057] Such as Figure 5 Shown is a structural diagram of another target supercapacito...
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The invention discloses a charging circuit of a super-capacitor. The charging circuit of a super-capacitor includes a feedback module and a target chip, wherein the feedback module is used for detecting magnitude of voltage of the target super-capacitor; and the target chip is connected to the feedback module for performing constant charging on the target super-capacitor when the magnitude of voltage is less than a preset threshold. Therefore, the charging circuit of a super-capacitor can avoid the situation that the electrode plate of the target super-capacitor is bent because of too large charging current of the target super-capacitor, during the initial charging stage of the target super-capacitor, and can also avoid the situation that the electrolyte of the target super-capacitor is boiling because of the too large charging voltage in the later stage of charging of the target super-capacitor, so as to scrap the target super-capacitor in advance. The charging circuit can avoid occurrence of abnormality of the target super-capacitor in the charging process.
Description
technical field [0001] The invention relates to the technical field of energy storage, in particular to a charging circuit for a supercapacitor. Background technique [0002] Super capacitors (electrochemical capacitors) are a power source with special properties between traditional capacitors and batteries. Supercapacitors have been widely used in industrial control because of their advantages such as high power density, fast charging speed, high capacity, good reversibility, long service life, and easy maintenance. [0003] In the existing supercapacitor charging circuit, one is to charge the supercapacitor in the way of constant current charging, but this kind of charging circuit will make the electrode voltage of the supercapacitor exceed the supercapacitor voltage in the later stage of charging the supercapacitor. The rated voltage value of the supercapacitor will cause the electrolyte in the supercapacitor to precipitate bubbles and appear in a boiling state, which wi...
Claims
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Login to View More IPC IPC(8): H02J7/00H02J7/34
CPCH02J7/0029H02J7/00304H02J7/0036H02J7/345
Inventor谢周悦
OwnerZHEJIANG HECHUAN TECH