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Direct current power supply and lead-acid storage battery parallel power supply method and its device

A lead-acid battery and DC power supply technology, applied in battery circuit devices, circuit devices, battery load switching, etc., can solve problems such as charging safety cannot be guaranteed, DC power supply is complicated, and output voltage is pulled down to achieve enhanced stability and robustness performance, easy maintenance, and the effect of improving the range

Inactive Publication Date: 2006-12-27
BYD CO LTD
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Problems solved by technology

[0002] The DC power supply of most electrical appliances in the existing electric vehicle is relatively complicated and inconvenient to maintain, especially the DC-DC impact resistance is generally weak, and the power supply cannot be automatically changed according to the load situation, and the output voltage will be pulled rapidly when the large current is output. Low, affecting the improvement of power supply efficiency, and there is no isolation element between the main DC-DC and the charging module, which cannot guarantee the safety of charging

Method used

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  • Direct current power supply and lead-acid storage battery parallel power supply method and its device

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Embodiment Construction

[0031] The present invention will be further described below with reference to the accompanying drawings and in conjunction with specific embodiments.

[0032] A DC power supply and lead-acid battery parallel power supply device, including a power supply branch composed of a lead-acid battery B and a charging module 1 that provides charging current to the lead-acid battery B in series, one end of the charging module 1 is connected to the DC power supply Positive pole + E, the other end of the charging module 1 is connected to the positive pole of the lead-acid battery B, and also includes a main power supply branch circuit composed of a DC-DC module 2, and the input terminal of the DC-DC module 2 is also connected to the DC The positive pole +E of the power supply, the output end of the DC-DC module 2 is connected to the load.

[0033] The DC-DC module 2 of the main power supply branch is a high-power DC-DC system composed of six single-ended flyback DC-DC modules;

[0034] T...

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Abstract

The disclosed parallel power supply method comprises: a large-power DC-DC system composed by at least two single-end reverse-activated DC-DC modules, and an isolation diode to isolate the DC-DC module and charge module, wherein continual increasing load when up to permissive maximal load, the output voltage of DC-DC module less than the lead acid accumulator and the difference larger than the forward conductive voltage drop of the diode, the accumulator begins to supply power. This invention can improve system robustness and charging security.

Description

technical field [0001] The invention relates to a method and a device for using a secondary battery or a secondary half-battery, in particular to a method and a device for supplying power in parallel between a DC power supply and a lead-acid storage battery. Background technique [0002] The DC power supply of most electrical appliances in the existing electric vehicle is relatively complicated and inconvenient to maintain, especially the DC-DC impact resistance is generally weak, and the power supply cannot be automatically changed according to the load situation, and the output voltage will be pulled rapidly when the large current is output. Low, affecting the improvement of power supply efficiency, and there is no isolation element between the main DC-DC and the charging module, which cannot guarantee the safety of charging. Contents of the invention [0003] The technical problem to be solved by the present invention is to make up for the defects of the prior art, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/34
CPCH02J7/0068H02J7/0065H02J2207/20
Inventor 张建华于宏波齐俊李林
Owner BYD CO LTD
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