Method and device for measuring heat generation power of batteries in condition of variable current

A technology of generating heat power and changing current, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of temperature difference, expensive testing equipment and expenses, unable to obtain heat generating power and heat, etc., and achieve low cost. , The effect of simple test equipment and easy implementation

Active Publication Date: 2015-04-29
BEIJING ELECTRIC VEHICLE
View PDF9 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the calorific value of lithium batteries is mostly described by the temperature rise curve. This method obtains the temperature difference and cannot obtain the specific heat generation power and heat.
[0003] At present, the existing technology generally uses accelerated calorimeters to test the calorific value of lithium batteries, but the test equipment a

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
  • Method and device for measuring heat generation power of batteries in condition of variable current
  • Method and device for measuring heat generation power of batteries in condition of variable current
  • Method and device for measuring heat generation power of batteries in condition of variable current

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0060] Example one

[0061] In order to overcome the shortcomings of current calculation methods for calorific value of power batteries such as lithium batteries and the high cost of testing, an embodiment of the present invention proposes a battery under constantly changing working current conditions, and the heating power varies with the test current and time. Calculation method.

[0062] The above-mentioned power battery may be a power battery such as a lithium battery, a lead-acid battery, and a nickel-cadmium battery. The following uses a lithium battery as an example to illustrate the embodiments of the present invention.

[0063] This embodiment provides a method for measuring the heating power of a battery under variable current conditions. The processing flow is as follows: figure 1 As shown, including the following processing steps:

[0064] Step S110: Measure the temperature rise data of the lithium battery during charging and / or discharging at different rates.

[0065] The...

Example Embodiment

[0102] Example two

[0103] This embodiment provides a schematic diagram of the current change over time of a certain type of lithium battery cell under actual working conditions as follows: image 3 As shown, to calculate the heating power of a certain type of lithium battery with current changes in actual working conditions, you can first measure the discharge temperature rise data of the type of lithium battery at different rates. The measurement results are shown in Table 1 below:

[0104] Table 1

[0105] time(s)

[0106] 6900

[0107] Using the data in Table 1 above, according to the calculation method in the above embodiment 1, the heat generation power at different magnifications is calculated as shown in Table 2:

[0108] Table 2

[0109]

[0110] Using the data in Table 2 above, the relationship between the heating power P and the discharge current I of the lithium battery can be obtained by curve fitting as follows:

[0111] P=0.0232I 2 +0.0421I+0.0032

[0112] The relati...

Example Embodiment

[0113] Example three

[0114] This embodiment provides a device for measuring the heating power of a battery under variable current conditions, and its specific implementation structure is as follows Image 6 As shown, it can specifically include the following modules:

[0115] The temperature rise data measurement module 61 with different magnifications is used to measure the temperature rise data of the battery during charging and / or discharging at different magnifications;

[0116] The heat generation power calculation module 62 of different magnifications is configured to calculate the heat generation power of the battery charged and / or discharged at different magnifications according to the temperature rise data obtained by the temperature rise data measurement module of the different magnifications;

[0117] The heat generating power and current value relational expression obtaining module 63 is configured to generate the current value corresponding to the heat generating power c...

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

Embodiments of the invention provide a method and device for measuring heat generation power of batteries in condition of variable current. The method comprises the following steps: measuring charging and/or discharging temperature rise data of a battery at different rates, and calculating charging and/or discharging heat generation powers of the battery at different rate according to the charging and/or discharging temperature rise data; generating a relation between the charging and/or discharging heat generation powers of the battery and the current values through curve fitting according to the current values corresponding to the charging and/or discharging heat generation powers at different rates. According to the embodiment of the invention, the relation among the heat generation powers as well as the current and time in condition of variable working current of the battery can be obtained by simply testing the temperature rise data of the battery at a fixed rate and then performing theoretical calculation according to the test result; the test equipment is simple, convenient to implement, and low in cost; a solution for effectively measuring the heat generation power of the battery in the process of charging and discharging in condition of variable current is provided.

Description

technical field [0001] The invention relates to the technical field of power batteries, in particular to a method and device for measuring the heat generation power of a battery under variable current conditions. Background technique [0002] As the new energy industry has higher and higher requirements on the performance and cycle life of lithium battery packs, more and more attention has been paid to the thermal management scheme of lithium battery packs, and the thermal management scheme needs to be designed according to the heat generation of ion batteries. At present, the calorific value of lithium batteries is mostly described by the temperature rise curve. This method obtains the temperature difference, but cannot obtain the specific heat generation power and heat. [0003] At present, the existing technology generally tests the calorific value of lithium batteries by accelerating calorimeters, but the testing equipment and costs are expensive, and most enterprises do...

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): G01R31/36G06F19/00
Inventor 翟文波
Owner BEIJING ELECTRIC VEHICLE
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