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Low-voltage power supply system of electric automobile

A technology for power supply systems and electric vehicles, which is applied in electric vehicles, battery circuit devices, current collectors, etc., to achieve the effect of improving functional safety level, reducing overall space and cost, and improving use efficiency

Pending Publication Date: 2022-08-02
HELLA SHANGHAI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This application provides a low-voltage power supply system for electric vehicles to solve the problem of how to flexibly distribute power according to vehicle needs for two sets of low-voltage battery power supply systems

Method used

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  • Low-voltage power supply system of electric automobile
  • Low-voltage power supply system of electric automobile

Examples

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Embodiment 1

[0043] figure 2 This is a schematic structural diagram of the first low-voltage battery pack when charging the second low-voltage battery pack according to the first embodiment of the present application. refer to figure 2 ,

[0044] The first low-voltage battery pack 21 includes a plurality of single cells, each of which is connected in parallel with the DC / DC converter 22 through the first control switch 211, and the second low-voltage battery pack 23 includes a plurality of single cells, each of which is connected in parallel with the DC / DC converter 22. The battery is connected in parallel with the DC / DC converter 22 through the second control switch 231. In the first embodiment of the present application, only the first single cell in the second low-voltage battery pack 23 needs to be charged, so the second low-voltage battery pack 23. The circuit in which other single cells are connected in parallel to the DC / DC converter 22 through the second control switch 231 is n...

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Abstract

The low-voltage power supply system comprises a high-voltage power supply, a first low-voltage storage battery pack, a second low-voltage storage battery pack and a battery management module, and the high-voltage power supply, the battery management module and the first low-voltage storage battery pack are sequentially connected in series to form a first charging and discharging circuit; the high-voltage power supply, the battery management module and the second low-voltage storage battery pack are sequentially connected in series to form a second charge-discharge circuit; the second charge-discharge circuit is connected with the first charge-discharge circuit in parallel. The first low-voltage storage battery pack and the second low-voltage storage battery pack can be controlled to charge and discharge simultaneously or independently through the battery management module, so that more use scenes of the batteries are covered, and the function safety level is improved; and only one set of battery management module is used for supporting two sets of battery systems of the first low-voltage storage battery pack and the second low-voltage storage battery pack, so that the overall space and cost of the product are greatly reduced.

Description

technical field [0001] The present application relates to the technical field of power supply systems, in particular to a low-voltage power supply system for electric vehicles. Background technique [0002] Low-voltage power supply systems are widely used in daily life. For example, electric vehicles, computers and other fields have applied low-voltage power supply systems. In the prior art, low-voltage power supply systems for electric vehicles usually include The battery, in which the step-down DCDC converter is used to convert the high-voltage direct current input from the high-voltage power supply into low-voltage direct current, and provide it to the low-voltage battery or the low-voltage load. When the electric vehicle is in a non-starting state, the low-voltage battery provides working power for its internal constant current components (such as the combination instrument, the vehicle controller, the power battery controller and the remote control system, etc.). When t...

Claims

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Application Information

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IPC IPC(8): H02J7/00B60L1/00
CPCH02J7/0019H02J7/0063H02J7/0047B60L1/00Y02T10/72
Inventor 刘灿
Owner HELLA SHANGHAI ELECTRONICS
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