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Method for testing working condition of battery of electric bicycle

A technology of electric bicycles and testing methods, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of shortening the test cycle and large gaps, and achieve the effect of shortening the test cycle

Pending Publication Date: 2021-09-21
浙江超恒动力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention mainly solves the problem of the large gap between the test and the actual working condition of the electric bicycle lithium battery in the prior art; it provides a working condition test method for the electric bicycle battery, fully considering the influence of ambient temperature, current, charging and discharging characteristics and calendar life The simulation of the actual working condition test can more truly reflect the performance of the battery pack under the actual working condition and shorten the test cycle

Method used

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  • Method for testing working condition of battery of electric bicycle
  • Method for testing working condition of battery of electric bicycle
  • Method for testing working condition of battery of electric bicycle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A working condition test method of an electric bicycle battery in this embodiment, such as figure 1 As shown, including the following steps:

[0050] S1: Put the battery to be tested into a high and low temperature box with a preset program. In the present embodiment, the production of a good 48V12AH battery module is placed in a high and low temperature tank with a program.

[0051] At present, electric bicycle batteries are generally required for three years (capacity retention rate ≥80%) in accordance with the vehicle factory and industry standards, according to civil market research and cycling requirements, the maximum frequency of use (charging time is half an hour above a cycle) About 200 times, three years, 600, in this embodiment, according to this standard, test its performance.

[0052] S2: High and low temperature box simulation sequence temperature variation cycle, each simulation season includes several different simulation stage temperatures.

[0053] Each si...

Embodiment 2

[0094] In the present embodiment, the production of 48V12AH battery modules will be placed in a high and low temperature box set with a program.

[0095] The high and low temperature box program set according to the four seasons temperature changes, the battery can test 200 cycles, and the programs in the high and low temperature box of the present embodiment are shown in Table 5:

[0096] Table 5. Embodiment of the high and low temperature box

[0097]

[0098] The above temperature setting According to the target use area (South), the average temperature in previous years.

[0099] According to the national standard test requirements, the charger current size, the rated power of the vehicle (current is non-linear), and the general riding habits (charging power is 100% SOC, the discharge power is generally controlled at 10-20% SOC ) To set the test process, the battery charge and discharge test process in this embodiment is shown in Table 6:

[0100] Table 6. Embodiment 2 Batte...

Embodiment 3

[0107] In the present embodiment, the production of a good 48V12AH battery module is placed in a high and low temperature tank with a program.

[0108] The program set in the high and low-temperature box is set according to the four seasons of temperature changes. The battery can test 200 cycles in the four seasons. The programs in the high and low temperature tanks in this embodiment are shown in Table 7:

[0109] Table 7. Program in the high and low temperature box in Example 3

[0110]

[0111]

[0112] The above temperature setting is based on the average temperature in the year (Northeast).

[0113] According to the national standard test requirements, the charger current size, the rated power of the vehicle (current is non-linear), and the general riding habits (charging power is 100% SOC, the discharge power is generally controlled at 10-20% SOC ) To set the test flow, the battery charge and discharge test process in this embodiment is shown in Table 8:

[0114] Table 8...

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Abstract

The invention discloses a method for testing the working condition of a battery of an electric bicycle. In order to overcome the problem that the difference between testing of an electric bicycle lithium battery and the actual working condition is large, the method comprises the steps of S1, putting a to-be-tested battery into a high-low temperature box with a preset program; S2, simulating the four-season temperature change cycle for several times by the high-low temperature box, wherein each simulation season comprises several different simulation stage temperatures; S3, carrying out a plurality of three-layer nested cycle battery charging and discharging tests at each simulation stage temperature, wherein the three-layer nested cycle comprises a multi-stage discharge cycle, a charge-discharge cycle and an overall cycle; and S4, correcting the capacity retention ratio obtained by completing the test, and evaluating the long-term use performance of the battery. The influence of environment temperature, current, charge and discharge characteristics and calendar life is fully utilized to simulate the actual working condition test, so that the performance of the battery pack under the actual working condition riding can be reflected more truly, and the test period is shortened at the same time.

Description

Technical field [0001] The present invention relates to a lithium battery testing, and more particularly to a working condition test method for an electric bicycle battery. Background technique [0002] Electric bicycles (two-wheeled vehicles) have become more and more social attention from the main penetration tools of towns and rural residents in my country. According to statistics, there are currently nearly 300 million electric bicycles in my country, and the annual production and sales volume is over 25 million. Electric bicycles are widely used in the upper and lower commuters, pick up children's upper school, shopping, short travel, etc. [0003] As people have more and more demand for electric bicycles, their performance is also concerned about more and more people. At present, electric bicycle batteries are mainly lead-acid batteries, although lithium batteries have less than 20% in electric bicycle, but the trend of penetration and replacement lead acid is accelerating....

Claims

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Application Information

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IPC IPC(8): G01R31/3842G01R31/392
CPCG01R31/3842G01R31/392
Inventor 苏锋常林荣常福荣张进孝孙翔宇陆鹏飞
Owner 浙江超恒动力科技有限公司
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