A power balance management system for series lithium battery packs
A lithium battery pack and balanced management technology, which is applied in battery circuit devices, current collectors, electric vehicles, etc., can solve the problems of increasing charge and discharge cycles of battery packs, complex structures, and large energy loss, so as to improve the overall capacity and service life , Simple circuit structure and low energy loss
Inactive Publication Date: 2016-01-06
深圳市雅格朗照明科技有限公司
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[0004] The technical problem to be solved by the present invention is to provide a circuit structure that is simple in the circuit structure, avoids the internal charge and discharge cycle of the battery pack, and reduces the energy Power balance management system for series lithium battery packs with less loss
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[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0023] In the embodiment of the power balance management system for series-connected battery packs of the present invention, the structural diagram of the system is as follows figure 1 shown. figure 1 Among them, the power balance management system of the series lithium battery pack includes a battery pack power module 1 and a charging power module 2, and the battery pack power module 1 and the charging power module 2 are connected by a DC power line; the battery p...
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The invention provides a serially-connected lithium battery set power supply equalization management system comprising a battery set power supply module and a charging power supply module which is connected with the battery set power supply module through a DC power line. The battery set power supply module comprises a serially-connected lithium battery set, a voltage detection control circuit and a breaking serial-connection switching circuit. If the voltage detection control circuit detects when the serially-connected lithium battery set discharges, the difference value of a maximum voltage and a minimum voltage of each single string of battery surpasses a set threshold value, the voltage detection control circuit controls the breaking serial-connection switching circuit to break the single string of battery, of which the voltage is the lowest. If the voltage detection control circuit detects some single string of battery reaches saturation in advance during charging, the voltage detection control circuit controls the breaking serial-connection switching circuit to break the single string of battery reaching saturation in advance, and sends serial-connection number change information to the charging power supply module to adjust a charging voltage. The beneficial effects of the serially-connected lithium battery set power supply equalization management system are that the circuit is simple in structure, charging-discharging circle inside the battery set is prevented, and energy loss is small.
Description
technical field [0001] The invention relates to the field of power supplies, in particular to a power balance management system for series lithium battery packs. Background technique [0002] Lithium batteries have been widely used due to their advantages such as high energy density, small self-discharge, no memory effect, green environmental protection, long service life and high voltage of single battery. Development of high-voltage power supply equipment. The voltage of lithium batteries cannot meet the needs of medium and high-power equipment. It is necessary to connect multiple batteries in series to meet the input voltage required by the power supply equipment or its power adapter circuit, or avoid low-voltage and high-current input to reduce the loss of input lines and rectification. When lithium batteries are used in series, due to the inconsistent initial performance (such as self-discharge rate, capacity, etc.) The same, and the difference between them will also ...
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IPC IPC(8): H02J7/00H02J7/10
Inventor 何志毅黄朝军赵中华陈桂兰
Owner 深圳市雅格朗照明科技有限公司