Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Undervoltage charging method of vehicle power battery

A technology of power battery and charging method, which is applied in the direction of battery/fuel cell control device, electric device, electric vehicle, etc., can solve battery charging and other problems, reduce safety accidents, improve safe and reliable management and service life, and save customers cost effect

Active Publication Date: 2016-09-28
SHENZHEN KELIE TECH
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose an undervoltage charging method for the problem that the BMS will cut off the charging and discharging circuit when the voltage of the single cell of the vehicle power battery drops below the undervoltage cut-off point, and the customer can no longer charge the battery.

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
  • Undervoltage charging method of vehicle power battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055]The present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0056] When the lithium battery voltage is very low, there will be a safety hazard in charging it. Mainly affects battery life. Under normal circumstances, it is difficult for a single cell to drop below a safe voltage. The safe charging voltage refers to the minimum charging voltage. Different batteries have different specific values. For ternary batteries (ternary polymer lithium batteries refer to lithium batteries whose cathode materials use lithium nickel cobalt manganese ternary cathode materials) generally at 2.5 Between V–2.75V. In most models, the undervoltage cut-off point of the single cell is higher than the safe voltage, and the cut-off point of the general ...

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 discloses an undervoltage charging method of a vehicle power battery. The undervoltage charging method comprises the following steps: S1: a BMS (battery management system) conducting power-on self-inspection; S2: judging whether the system works normally, if the system works normally, executing the S3, and if the system does not work normally, skipping to the S8; S3: detecting voltage of each single battery, judging whether the voltage of each single battery is lower than the safety threshold, if the voltage of each single battery is not lower than the safety threshold, skipping to the S8; S4: detecting voltage redundancy, if the voltage redundancy is normal, executing the step S5, and if the voltage redundancy is abnormal, skipping to the S8; S5: detecting voltage of each single battery, judging whether the voltage of each single battery has an undervoltage alarm, if the voltage of each single battery has the undervoltage alarm, executing the S6, and if the voltage of each single battery does not have the undervoltage alarm, executing the S7; S6: entering an undervoltage charging process; S7: entering a normal charging process; and S8: stop charging, the end. The undervoltage charging method solves the charging problem when the voltage of each single battery of the vehicle power battery is lower than the undervoltage cutoff point but higher than safety charging voltage.

Description

technical field [0001] The invention relates to the technical field of vehicle power batteries, in particular to a method for undervoltage charging of vehicle power batteries. Background technique [0002] With the development of electric vehicles and hybrid power tools, various power batteries are widely used. Lithium batteries have become the most promising power batteries due to their small size, low self-discharge rate, high energy density, and long cycle life. However, the safety and stability of lithium batteries are not high, and overcharging and overdischarging will cause damage to lithium-ion batteries. Therefore, in order to ensure the safe operation of lithium-ion batteries, a high-performance battery management system (BMS) must be equipped. [0003] The existing lithium battery management system has a single charging strategy and mostly uses constant current charging, which cannot be charged reasonably according to the characteristics of the battery. The chargi...

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): B60L11/18B60L3/00
CPCB60L3/0046B60L58/12B60L58/20Y02T10/70
Inventor 杨希刚范先胜张志国
Owner SHENZHEN KELIE TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com