A Low Voltage Redundant Power Supply System
A power supply system, low-voltage technology, applied to load supply circuits, collectors, electric vehicles, etc., can solve the problems of inability to realize low-voltage load redundant power supply, low-voltage batteries occupy a large space, and have no active equalization function, etc., to improve power supply Reliability, avoiding power derating, and reliable effect of low-voltage power supply system
Active Publication Date: 2022-01-14
HUAWEI TECH CO LTD
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[0004] In view of this, the embodiment of the present application provides a low-voltage redundant power supply system to solve the problems that the low-voltage battery occupies a large space, has no active equalization function, and cannot realize redundant power supply for low-voltage loads
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[0060] In the following description, references to "some embodiments" describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or a different subset of all possible embodiments, and Can be combined with each other without conflict.
[0061] In the following description, the terms "first\second\third" or module A, module B, module C, etc. involved are only used to distinguish similar objects, and do not represent a specific ordering of objects, understandable Obviously, where permitted, the specific order or sequence can be interchanged such that the embodiments of the application described herein can be practiced in other sequences than those illustrated or described herein.
[0062] In the following description, the involved reference numerals representing steps, such as S110, S120, etc., do not mean that this step must be executed, and the order of the previous and subsequent steps can be interchanged or executed simu...
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An embodiment of the present application proposes a low-voltage redundant power supply system, including: a high-voltage battery pack for providing a first voltage, the high-voltage battery pack includes several power supply units connected in series; the power supply unit is at least one battery or battery in the high-voltage battery pack Several battery series / parallel equivalent power sources; and a relay array, each relay in the relay array is connected to each power supply unit in the high-voltage battery pack according to a set connection relationship; at least one of the relay arrays In the combined mode of opening and closing states, at least one power supply unit in the high-voltage battery pack provides a second voltage through time-division multiplexing to supply power for low-voltage loads; the first voltage is higher than the second voltage. The system can solve the problem that the traditional low-voltage power supply scheme cannot actively balance the battery and cannot realize the redundant power supply function for the low-voltage load, can improve the reliability of power supply, and avoid the power derating of the high-voltage power system caused by the unbalanced SOC of the battery.
Description
technical field [0001] The present application relates to the technical field of electric vehicles, in particular to a low-voltage redundant power supply system. Background technique [0002] Most of the current low-voltage power supply systems for electric vehicles follow the power supply scheme of traditional fuel vehicles, that is, an independent 12V lead-acid battery is configured to provide power to the controller and other low-voltage devices. The independent 12V battery not only takes up a lot of space and reduces the energy density of the power supply system, but also cannot guarantee the reliability of power supply due to the use of a single power supply. When the vehicle is stagnant for a long time, it is easy to cause the vehicle to fail to start normally. [0003] In some existing technologies, although a redundant power supply system or an intelligent supplementary power system using two low-voltage batteries improves the reliability of power supply for low-volt...
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IPC IPC(8): H02J7/00B60R16/033
CPCH02J7/0013H02J7/0063H02J7/0014H02J7/0019B60R16/033H02J1/086H02J1/082H02J7/0024H02J2310/48H02J7/342
Inventor 王辉杨露露孙坚宋天助
Owner HUAWEI TECH CO LTD