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

A test method for heat generation rate of power battery

A power battery and testing method technology, which is applied in the direction of measuring electricity, measuring devices, and measuring electrical variables, etc., can solve the problems of cumbersome testing process and lack of universal applicability, and achieve short test cycle, few test parameters, and reduced errors Effect

Active Publication Date: 2020-09-04
UNIV OF SHANGHAI FOR SCI & TECH +1
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This test method takes into account the impact of heat loss on the lithium-ion battery during charging and discharging, which improves the test accuracy, but the test process is cumbersome and not universal

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
  • A test method for heat generation rate of power battery
  • A test method for heat generation rate of power battery
  • A test method for heat generation rate of power battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0042] The invention relates to a method for testing the heat generation rate of a power battery, which is used for testing the heat generation rate of the power battery under different working conditions and working with different rate currents when the initial temperature and working current of the power battery are changed during the working process. heat rate. The power battery in this embodiment is covered by an airgel felt with a thickness of 20 mm, which is placed in the center of a cube-shaped pearl cotton, and the side length of the solid pearl cotton is not less than twice the height of the power battery. The power battery, airgel felt and pearl cotton are all placed in a constant temperature box, and the initial temperature is provided by the constant temperature box, and its temperature control range is greater than the working temperature range of the power battery.

[0043] In this embodiment, the average temperature of the power battery is represented by the ave...

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 method for testing the heat generation rate of a power battery. The method comprises a step of placing the power battery in an approximately adiabatic environment and measuring the heat loss and temperature change of the power battery during a working process, a step of fitting a function equation of a power battery average temperature with a working time and calculatinga first-order derivative of the equation to obtain a temperature drop rate of the power battery, and a step of calculating a curve equation of the heat generation rate of the power battery with the working time based on the law of conservation of energy. The method for testing the heat generation rate of the power battery in the working process has the advantages of a simple test process, a shorttest period, easy operation and an accurate test result and can be applied to the testing of the heat generation rate of the power battery in the conditions of a wide working temperature range, a high working current and the like.

Description

technical field [0001] The invention relates to the technical field of power batteries, in particular to a method for testing the heat generation rate of a power battery. Background technique [0002] In recent years, with the rapid development of the electric vehicle industry, the market demand for power batteries for passenger vehicles has increased rapidly, and at the same time, the safety of power batteries has attracted increasing attention. The safety problem of power batteries is mainly caused by thermal runaway, so the research on the thermal characteristics of power batteries has become the focus of the industry. Thermal runaway of vehicle power batteries is mainly caused by poor thermal management, so thermal management of vehicle power batteries is very important. The heat generation rate of the power battery during the working process is a thermal characteristic parameter that must be well known for its thermal management, and is usually expressed as the heat ge...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/385
Inventor 苏林盛雷张恒运方奕栋徐海峰
Owner UNIV OF SHANGHAI FOR SCI & 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