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New-energy automobile power supply system with low-voltage batteries cancelled

A new energy vehicle and power supply system technology, applied in the field of new energy vehicles, can solve the problems of limited low-voltage battery voltage level, low voltage battery power, and increased hardware circuit cost of the vehicle system, achieving the effect of reducing volume and improving performance

Inactive Publication Date: 2018-07-31
HEFEI JUYI POWER SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] (2) The low-voltage battery needs a special battery detection system, which increases the cost of the hardware circuit of the vehicle system;
[0010] (3) The power of the low-voltage battery is low, and when it is stagnant for a long time or the low-voltage is turned on, it is easy to cause undervoltage and the vehicle cannot be started normally.
[0011] (4) The voltage level of low-voltage batteries is limited, which cannot meet the needs of high-voltage electrical equipment for automobiles, and the performance requirements for high-voltage DC-DC modules are relatively high

Method used

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  • New-energy automobile power supply system with low-voltage batteries cancelled
  • New-energy automobile power supply system with low-voltage batteries cancelled
  • New-energy automobile power supply system with low-voltage batteries cancelled

Examples

Experimental program
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Effect test

Embodiment 1

[0036] The solution of this embodiment is to supply power to the low-voltage control system circuit through a simple high-voltage-to-low-voltage and low-power step-down regulator circuit module, and the low-voltage equipment is powered through the DC / DC module. Such as figure 2 Shown is the diagram of the improved new energy vehicle power supply system. The power supply system for new energy vehicles in this solution includes a high-voltage battery pack, a DC / DC conversion module and a motor controller. For power supply, the motor controller controls the high-voltage battery pack to supply power to the motor of the car. The motor controller includes a control board and a voltage stabilizing circuit module, and the voltage stabilizing circuit module outputs required voltages of different levels to the control board.

[0037] Low voltage regulator circuit modules such as image 3 As shown, the voltage stabilizing circuit module includes several button batteries and a DC-DC vo...

Embodiment 2

[0039] The scheme of this embodiment is as Figure 4 As shown, the new energy vehicle power supply system includes a high-voltage battery pack composed of several single cells connected in series, and there are 48V voltage taps and 12V voltage taps between the single cells. The 12V voltage tap of the high-voltage battery is directly connected to the negative pole through a 12V load; the 48V voltage tap is connected to the negative pole through a 48V load and the electric control switch S1; 1. The electric control switch S2 is connected; the positive and negative poles of the high-voltage battery pack are also connected and charged through the high-voltage connector, and the electric control switch S3 is also connected in series on the charged negative pole. The vehicle-mounted 12V control system controls the opening and closing of each electric control switch.

[0040] When the new energy vehicle is not started, the 12V circuit of the high-voltage battery continues to work to...

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Abstract

The invention discloses a new-energy automobile power supply system with low-voltage batteries cancelled. According to the requirements of the power supply system of a new-energy automobile, two low-voltage battery replacing schemes are proposed, and power is supplied to all low-voltage power use devices of the new-energy automobile through a high-voltage battery pack; a new power supply module uses a simple voltage stabilization module to maintain normal operation of a high-voltage DC-DC module, so that a battery electric vehicle control system normally and stably operates, and all power usedevices work normally after high voltage is supplied; and the voltage stabilization module is integrated in a controller control panel, the existing low-voltage storage batteries are completely replaced, and the size of the whole automobile is reduced. The combination of relays is applied to work, and the performance requirements of the DC-DC module and the low-voltage batteries of an existing system are completely changed.

Description

technical field [0001] The invention relates to a new energy vehicle, in particular to a new energy vehicle power supply system which cancels a low-voltage battery. Background technique [0002] New energy vehicles have been more and more widely used due to their higher efficiency and less damage to the environment. However, the existing low-voltage system of new energy vehicles still adopts the low-voltage distribution scheme of traditional internal combustion vehicles—that is, it is equipped with a separate 12V lead-acid battery or 12V lithium battery. In this way, the battery management system needs to monitor two battery modules (high-voltage battery pack and low-voltage battery) at the same time; in addition, the lead-acid battery has a short life, which increases the space occupied by installing it in new energy vehicles, and at the same time increases the weight of new energy vehicles. system power density. [0003] In addition, due to the low capacity of the 12V lo...

Claims

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Application Information

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IPC IPC(8): B60R16/033B60L11/18
CPCB60L50/50B60R16/033Y02T10/70
Inventor 刘蕾张守先范佳伦方玲丽张茨
Owner HEFEI JUYI POWER SYST CO LTD
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