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

Capacity grading compensation method

A compensation method and a capacity-dividing technology, applied in the field of capacity-dividing compensation, can solve the problems of false high capacity, cell capacity deviation, low capacity, etc., and achieve the effect of high cost efficiency, low cost, and low cost.

Active Publication Date: 2018-07-24
DONGGUAN LIWINON ENERGY TECH
View PDF6 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Generally, the customer's requirement is the capacity data in a stable constant temperature environment of 25°C, while the environment of the capacity separation test process in the production process of polymer lithium-ion batteries is dynamic, generally under the condition of 25±5°C Therefore, the normal production test shows that the battery capacity has a large deviation from the customer's requirements. When the temperature is low, there will be a low capacity phenomenon, and when the temperature is high, the capacity will be falsely high. This is the current polymer lithium-ion battery production. The problem that has been bothering

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
  • Capacity grading compensation method
  • Capacity grading compensation method
  • Capacity grading compensation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] This embodiment provides a capacity division compensation method, including the following steps:

[0020] Step 1: Under different temperature environments, test the discharge capacity of the same system cell, and use a mathematical model to perform nonlinear fitting between the test temperature and discharge capacity of the cell, and the formula is as follows:

[0021] C 容量 =C 实测容量 +K 1 *(T 实测 -25) 3 +K 2 *(T 实测 -25) 2 +K 3 *T 实测 +B

[0022] Among them, C 容量 is the discharge compensation capacity in mAh; C 实测容量 is the actual discharge capacity in mAh; K 1 、K 2 and K 3 Both are compensation coefficients; T 实测 is the compensation temperature value; B is the offset coefficient;

[0023] Step 2: During the capacity separation test, record the initial discharge voltage, discharge current, discharge temperature and actual discharge capacity, select the average value of the discharge temperature as the compensation temperature value, and set the compensation co...

Embodiment 2

[0026] This embodiment provides a capacity division compensation method, including the following steps:

[0027] Step 1: Under different temperature environments, test the discharge capacity of the same system cell, and use a mathematical model to perform nonlinear fitting between the test temperature and discharge capacity of the cell, and the formula is as follows:

[0028] C 容量 =C 实测容量 +K 1 *(T 实测 -25) 3 +K 2 *(T 实测 -25) 2 +K 3 *T 实测 +B

[0029] Among them, C 容量 is the discharge compensation capacity in mAh; C 实测容量 is the actual discharge capacity in mAh; K 1 、K 2 and K 3 Both are compensation coefficients; T 实测 is the compensation temperature value; B is the offset coefficient;

[0030] Step 2: During the capacity separation test, record the initial discharge voltage, discharge current, discharge temperature and actual discharge capacity, select the average value of the discharge temperature as the compensation temperature value, and set the compensation co...

Embodiment 3

[0033] This embodiment provides a capacity division compensation method, including the following steps:

[0034] Step 1: Under different temperature environments, test the discharge capacity of the same system cell, and use a mathematical model to perform nonlinear fitting between the test temperature and discharge capacity of the cell, and the formula is as follows:

[0035] C 容量 =C 实测容量 +K 1 *(T 实测 -25) 3 +K 2 *(T 实测 -25) 2 +K 3 *T 实测 +B

[0036] Among them, C 容量 is the discharge compensation capacity in mAh; C 实测容量 is the actual discharge capacity in mAh; K 1 、K 2 and K 3 Both are compensation coefficients; T 实测 is the compensation temperature value; B is the offset coefficient;

[0037] Step 2: During the capacity separation test, record the initial discharge voltage, discharge current, discharge temperature and actual discharge capacity, select the average value of the discharge temperature as the compensation temperature value, and set the compensation co...

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 belongs to the field of automatic manufacturing of lithium ion batteries and particularly relates to a capacity grading compensation method which comprises the following steps: performing battery cell capacity grading, at the same time monitoring and testing an ambient temperature, synchronously recording voltages and current of a battery cell in capacity grading, and compensating according to a capacity and temperature fitting curve till a capacity in an environment required by a customer, so as to effectively reducing the problems that testing conditions required by customers and manufacturers are not accordant. In addition, by adopting the method provided by the invention, automatic compensation can be achieved from local testing equipment to an MES (Manufacturing Execution System) simultaneously, by barcode tracing can be achieved, and the method is low in cost and high in efficiency.

Description

technical field [0001] The invention belongs to the field of automatic manufacturing technology of lithium ion batteries, and in particular relates to a capacity division compensation method. Background technique [0002] In recent years, lithium-ion batteries have been widely used in various fields such as electronic products due to their high energy density, high voltage, high cycle, high safety, and environmental protection. Among them, after the lithium-ion battery is manufactured, in order to verify the quality and performance of the product battery and further dredge the Li + The transmission path between the positive and negative electrodes improves the cycle performance of the battery in the later use process and ensures the safety performance of the product after leaving the factory. Before leaving the factory, the lithium-ion battery needs to be charged and discharged several times. This process is called "capacity separation". ". [0003] Generally, the customer...

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): H01M10/42H01M10/44
CPCH01M10/4285H01M10/446Y02E60/10
Inventor 梁光照陈劲松郑明清龙世隆王威李载波杨山
Owner DONGGUAN LIWINON ENERGY 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