A floating constant current charging circuit
A constant current charging and floating technology, applied in battery circuit devices, safety/protection battery circuits, charging/discharging current/voltage regulation, etc. Large and other problems, to achieve the effect of improving charging efficiency, sensitive output short circuit protection, and increasing voltage range
Active Publication Date: 2018-11-30
郴州市福瑞康电子有限公司
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Problems solved by technology
At present, most batteries are charged by constant current circuit. The existing constant current circuit has a narrow working voltage range and cannot meet the requirements of wide voltage output.
When the number of battery cells changes greatly, the voltage difference of the battery will change greatly, and the charging efficiency will decrease
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[0017] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0018] see figure 1 The principle block diagram shown, the floating constant current charging circuit disclosed by the present invention includes: connecting the positive input pole of the DC power supply and the input ground, connecting the positive output pole of the battery pack and the floating ground, connecting the positive pole of the output and the floating ground A freewheeling energy storage module, an inductance element connected in series between the floating ground and the input ground, an electronic switch Q1, and a PWM control module for controlling the on-off of the electronic sw...
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The invention discloses a constant-current charging circuit adopting floating ground mode. The constant-current charging circuit comprises an input anode, input ground, an output anode and floating ground which are connected with a battery set, a freewheeling energy storage module connected between the output anode and the floating ground, an inductance element and an electronic switch (Q1) successively and serially connected between the floating ground and the input ground, and a PWM control module controlling the on-off state of the electronic switch. According to the invention, the floating ground structure mode is utilized, and combined with a common topological circuit, constant-current charging circuit carries out constant-current charging on a plurality of serial batteries, the voltage range and the charging efficiency of the charging circuit are effectively improve, the practicality is high, and the controllability is good; when the output is short-circuited or overloaded, the circuit is totally in a zero load state, and the circuit is always in a most energy-saving state; in addition, by adopting the constant-current charging circuit, 2 to 32 batteries can be charged with a constant current, and when the number of the batteries changes, only the input voltage needs to be adjusted, so that the circuit is enabled to work at the optimal state.
Description
technical field [0001] The invention relates to a charging circuit, in particular to a floating constant current charging circuit. Background technique [0002] With the development of power storage technology, multi-level batteries are more and more used in people's daily life and work. At present, most batteries are charged by a constant current circuit. The existing constant current circuit has a narrow operating voltage range and cannot meet the requirements of wide voltage output. When the number of battery cells changes greatly, the voltage difference of the battery will change greatly, and the charging efficiency will decrease. Contents of the invention [0003] The present invention aims to solve the above-mentioned problems in the prior art, and proposes a floating constant current charging circuit. [0004] In order to solve the above technical problems, the technical solution proposed by the present invention is to design a floating constant current charging c...
Claims
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IPC IPC(8): H02J7/00
CPCH02J7/0026H02J7/0029H02J7/00304H02J7/007Y02E60/10
Inventor 王本欣
Owner 郴州市福瑞康电子有限公司