Power battery alternating current varying current gradient heating method

A power battery and heating method technology, which is applied to battery/fuel cell control devices, secondary batteries, circuits, etc., can solve the problems of not considering the safety performance of the battery, the inability to effectively limit the battery voltage, and shortening the battery life

Active Publication Date: 2017-09-15
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF8 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the common internal heating methods mainly include alternating current heating method, but in the prior art, in the process of alternating current heating, the alternating current of single amplitude and frequency is used, without considering the safe

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Power battery alternating current varying current gradient heating method
  • Power battery alternating current varying current gradient heating method
  • Power battery alternating current varying current gradient heating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The power battery involved in the present invention includes a power battery unit, a power battery pack, or a grouped power battery pack.

[0023] The present invention uses OCV to represent the open circuit voltage, I to represent the input AC excitation current of the power battery, and T to be the temperature of the power battery.

[0024] The power battery alternating current variable current gradient heating method described in the present invention is as attached figure 1 shown.

[0025] The method for stepwise heating of a power battery with an alternating current variable current according to the present invention includes: establishment of an OCV-T curve, establishment of an R-T model, and calculation of an alternating current excitation current amplitude. The following describes each of the above parts in detail:

[0026] First of all, the establishment method of the OCV-T curve is as follows. The OCV and T of the power battery have a one-to-one mapping rela...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a power battery alternating current varying current gradient heating method. The method is characterized in that the alternating current excitation current amplitude is timely calculated and updated according to the temperature of an existing power battery packet, the external environment temperature, and the terminal voltage and other detection signals of power batteries, and is applied to two ends of every battery in order to guarantee that the terminal voltages of the batteries do not exceed limits and the current is positioned in the born current range allowed by the batteries, so the low-temperature working performances of the power batteries are improved. The heating method solves the problems of slow heating speed, poor effects, voltage exceeding limits in the heating process and affection of the life of the batteries of existing battery heating methods in low temperature environment, has the advantages of good effect, high robustness and good safety, and provides guarantee for the reliable running of the power batteries.

Description

technical field [0001] The invention relates to the field of power battery thermal management, in particular to a low-temperature heating method for a power battery. Background technique [0002] In a low temperature environment, it is necessary to preheat the battery in advance to increase the cold start temperature of the power battery and improve the working performance of the battery. [0003] At present, low-temperature heating is commonly used to solve the low-temperature problem of batteries. There are mainly external heating methods such as air heating, liquid cooling, and electric heating. However, these low-temperature external heating systems for vehicle batteries have low energy utilization and poor heating effects. After the battery is heated to the specified temperature within a certain period of time, a large heat loss is caused due to heat exchange between the battery and the external environment, heat radiation, etc. The control of the working environment te...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M10/615H01M10/625H01M10/635H01M10/637B60L11/18
CPCB60L58/27H01M10/615H01M10/625H01M10/635H01M10/637Y02E60/10Y02T10/70Y02T90/40
Inventor 熊瑞郭姗姗何洪文孙逢春
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap