Method and system for preventing insufficient voltage of low-voltage battery after new energy vehicle is parked

A new energy vehicle, low-voltage battery technology, applied in battery circuit devices, vehicle components, current collectors, etc., can solve the problems of battery power loss and inability to start, and achieve the effect of reducing energy consumption and prolonging service life

Inactive Publication Date: 2019-05-03
HENAN SENYUAN HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a low-voltage battery anti-loss method and system after a new energy vehicle is parked, so as to solve the problem that the new energy vehicle cannot start due to battery loss after a long period of parking

Method used

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  • Method and system for preventing insufficient voltage of low-voltage battery after new energy vehicle is parked
  • Method and system for preventing insufficient voltage of low-voltage battery after new energy vehicle is parked
  • Method and system for preventing insufficient voltage of low-voltage battery after new energy vehicle is parked

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] Such as image 3 The schematic diagram of a low-voltage battery loss prevention system after a new energy vehicle is parked is shown, including a voltage monitoring module 1, a BMS battery management system 2, a DCDC voltage conversion module 3, a low-voltage battery 4, and a main-negative relay 5; The busbar is connected to the charging circuit of the low-voltage battery 4 through the DC voltage conversion module 3; the positive charging circuit of the low-voltage battery 4 is connected in series with a main negative relay 5, and the main negative relay 5 is controlled and connected by the power management system 2 ; The power management system 2 is connected to the DC voltage conversion module 3 through a CAN network.

[0027] Such as figure 1 The working flow diagram of the shown voltage monitoring module 1, its working process includes:

[0028]...

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Abstract

The invention provides a method and system for preventing insufficient voltage of a low-voltage battery after a new energy vehicle is parked. As for the new energy vehicle, the low-voltage storage battery suffers from self-discharging when the vehicle is parked for a long time, and the integral controller and the battery management system of the parked vehicle are under a sleeping or off state, and cannot start DCDC on demand to enable a high voltage system to charge for the low-voltage storage battery. The problem that the integral controller cannot be started and the relay cannot be driven due to excessively-low voltage so that the vehicle cannot be started after the vehicle is parked for a long time can be resolved. With an independent voltage monitoring module, the battery management system and a DC voltage converting module can be awakened actively, when the voltage of the storage battery is lower than the set threshold value. Energy can be compensated for the low-voltage storagebattery, and the normal starting of a vehicle after being parked for a long time can be guaranteed.

Description

technical field [0001] The invention relates to a method and system for preventing power loss of a low-voltage battery after a new energy vehicle is parked, and belongs to the technical field of new energy vehicles. Background technique [0002] At present, the voltage platform used in the low-voltage part of the new energy on-board control system is mostly 12V, and the energy storage device uses a lead-acid battery. When the new energy vehicle is started, the low-voltage battery supplies power to the vehicle control system and corresponding relays. When the low-voltage battery is insufficient, the high-voltage power battery is usually selected to supplement energy for the low-voltage battery through a DC high-voltage conversion device, and the start and stop of the entire system are controlled by the key switch. [0003] After the new energy vehicle is parked and shut down, in order to reduce the power loss after the vehicle stops, the vehicle controller and the battery ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L3/00B60R16/02H02J7/00
Inventor 陈西山梁法明顾帅旗常乐古伟鹏汪世伟张幸
Owner HENAN SENYUAN HEAVY IND
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