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Controlling method for fast warm-up of power battery

A power battery and control method technology, applied in the direction of battery/fuel cell control devices, batteries, secondary batteries, etc.

Active Publication Date: 2018-08-24
CHINA FIRST AUTOMOBILE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above technical problems, the present invention provides a fast warm-up method for a power battery, which aims to solve the problem of fast warm-up of the power battery in a 48V mild hybrid electric vehicle in a low-temperature environment

Method used

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  • Controlling method for fast warm-up of power battery

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Embodiment Construction

[0044] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0045] The fast warm-up control method of the power battery provided by the embodiment of the present invention is used to realize the fast warm-up of the power battery of the 48V mild hybrid power system, mainly through the HCU (Hybrid Control Unit) to monitor the SOC (State of the 48V battery). of Charge battery state of charge), peak charge and discharge current and cut-off voltage and other status information, to control the motor and DC / DC (Direct Current / Direct Current DC to DC power supply) converter, so that the battery through the peak power or equal power Charging and discharging to realize the rapid temperature rise inside the monomer, which has the effect of warming up the engine. After the battery is warmed up, the 48V funct...

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Abstract

The invention provides a controlling method for fast warm-up of a power battery. The controlling method for the fast warm-up of the power battery is used for realizing fast warm-up of the power battery of a 48V light hybrid power system. When it is detected that temperature of a 48V battery is lower than a preset temperature, a fast warm-up mode is started, after the fast warm-up mode is started,according to the temperature of 48V battery, the 48V battery can be charged and discharged selectively with a 12V battery and a motor for warm-up, so that fast warm-up of the 48V power battery is achieved.

Description

Technical field [0001] The invention relates to a fast heating method for a power battery, in particular to a fast heating method for a power battery of a 48V mild hybrid vehicle. Background technique [0002] For hybrid electric vehicles, the most important reason for fuel saving is that the two power sources of engine and motor work together to achieve high system efficiency and reduce vehicle fuel consumption. As the direct supplier of motor energy, the performance of the power battery is greatly affected by temperature. Especially at low temperatures, the battery's charge and discharge capacity is limited, which restricts the vehicle power system from exerting its hybrid power function and affects the vehicle's fuel consumption. Therefore, allowing the battery to quickly warm up at low temperatures and restore its normal charge and discharge capabilities has strong practical significance for maintaining the normal driving function of the vehicle and reducing energy consumptio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18H01M10/615H01M10/625
CPCB60L2240/545B60L58/25H01M2220/20H01M10/615H01M10/625Y02E60/10Y02T10/70
Inventor 张昶李川杨钫杨兴旺付磊
Owner CHINA FIRST AUTOMOBILE
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