A charging equalization control circuit, battery pack charging management system and method
A control circuit and charge equalization technology, applied in battery circuit devices, circuit devices, current collectors, etc., can solve problems such as shortening the service life of the battery pack, incomplete discharge of the battery pack, and inability to meet the energy storage requirements, and achieve mutual transfer. , to maximize and achieve the effect of energy storage
Active Publication Date: 2018-01-26
安徽融慧矿山装备科技有限公司
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Problems solved by technology
When the battery pack is discharging, if the voltage of a certain battery reaches the cut-off voltage, the entire battery pack will stop discharging, and at this time other batteries may still have remaining capacity, which will make the entire battery pack discharge incomplete
After multiple charge / discharge cycles, the performance of the battery with the smallest capacity will decay faster than other batteries, and the performance of the entire battery pack will continue to decrease. Over time, the entire battery pack will not only fail to meet the energy storage requirements, but will also seriously shorten Lifetime of the entire battery pack
Method used
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[0027] The present invention will be further described below in conjunction with accompanying drawing.
[0028] Such as figure 2 as shown, figure 2 A battery pack composed of three batteries in series, a charge equalization control circuit, including a battery pack composed of multiple single batteries in series, a plurality of first voltage transfer circuits and a second voltage transfer circuit, the battery pack Each single battery is connected in parallel with a first voltage transfer circuit, the positive pole of the single battery is electrically connected to the drain of the MOSFET in the first voltage transfer circuit, and the negative pole of the single battery is connected to the inductor in the first voltage transfer circuit. One end of the electrical connection;
[0029] The first voltage transfer circuit is composed of a MOSFET, an inductor and a diode, wherein the source of the MOSFET is electrically connected to the cathode of the diode and one end of the ind...
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The invention discloses a charging equalized control circuit and a battery pack charging management system and method. Each single battery in a battery pack is connected in parallel with a first voltage transfer circuit. Each first voltage transfer circuit is composed of a MOSFET, an inductor, and a diode. The source electrode of each MOSFET is electrically connected with the negative pole of the corresponding diode and one end of the corresponding inductor. A second voltage transfer circuit is composed of a MOSFET, a capacitor, an inductor, and a diode. The positive poles of the diodes in the first voltage transfer circuits each of which is connected in parallel with corresponding single battery are communicated and then are electrically connected with the source electrode of the MOSFET in the second voltage transfer circuit. In the second voltage transfer circuit, the negative pole of the diode and the positive pole of the capacitor are electrically connected with both ends of the battery pack, respectively. The battery pack charging management system and method may accurately control the voltage and the current of the batteries and guarantee accurate consistency of the voltage of the single batteries.
Description
technical field [0001] The invention belongs to the field of battery charging, and in particular relates to a charging equalization control circuit, a battery pack charging management system and a method. Background technique [0002] Usually, a battery pack is composed of multiple single cells connected in series, and the unbalanced capacity among the batteries will affect the performance of the entire battery pack. Currently existing battery charge management systems usually only have protection devices but no voltage equalization devices. When the capacity of a single battery is not balanced with the capacity of other batteries, the performance of the entire battery pack will be affected. When charging the battery pack, if a battery in the battery pack is fully charged, the charging of the entire battery pack will be stopped, while other single cells may not have reached the full charge state, so the entire battery pack will not reach the maximum capacity. . When the ba...
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IPC IPC(8): H02J7/00
Inventor 张家兵王红军田春峰谢泽亮姜飞陈争峰夏晨阳邵明建徐涛罗士彬刘东刘锋
Owner 安徽融慧矿山装备科技有限公司