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A lithium battery system with self-repair function and self-repair method thereof

A lithium battery, self-repair technology, applied in secondary battery repair/maintenance, secondary battery, secondary battery testing, etc., can solve problems such as abnormal power output, output voltage fluctuation, and reduced lifespan, to improve performance and lifespan , The effect of small voltage and current stress and high transmission power

Active Publication Date: 2021-02-09
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a lithium battery system with a self-repair function and its self-repair method, thereby solving the problems of output voltage fluctuations, Technical problems of abnormal power output, performance degradation, and lifespan reduction

Method used

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  • A lithium battery system with self-repair function and self-repair method thereof
  • A lithium battery system with self-repair function and self-repair method thereof

Examples

Experimental program
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Embodiment 1

[0034] A lithium battery system with self-healing function, comprising:

[0035]A battery pack, the positive output terminal and the negative output terminal of the battery pack are connected to the load; a bidirectional DC-DC converter; the positive pole of the high voltage side of the bidirectional DC-DC converter is connected to the positive pole of the battery pack control terminal, and the negative pole of the high voltage side is connected to the battery pack control terminal Negative pole; supercapacitor bank, the positive output terminal of the supercapacitor bank is connected to one end of the low-voltage side of the bidirectional DC-DC converter, and the negative output terminal is connected to the other end of the low-voltage side of the bidirectional DC-DC converter; processor, the processor controls The terminals are respectively connected to the control terminal of the DC-DC converter, the control terminal of the battery switch, and the signal output terminal of t...

Embodiment 2

[0038] A self-repair method of a lithium battery system with self-repair function, comprising the steps of:

[0039] When the battery pack is charging, S1~S5, S6, and S13 are closed, and the processor realizes step-down charging by controlling the duty cycle of the gate signal output to the H-bridge NMOS transistor of the bidirectional DC-DC converter. The external power supply is charging the battery pack. At the same time, the supercapacitor pack is charged. After the charging is finished, S6-S13 are disconnected. When the battery pack is working normally and discharged externally, the battery detection module detects the status data of the lithium battery in the battery pack, and transmits the status data to the processor, so that the processor can obtain the status data of each lithium battery; according to the status data of each lithium battery, The processor controls the on and off of S1-S13. Among them, according to the state data of each lithium battery, the steps o...

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Abstract

The invention discloses a lithium battery system with a self-repair function and a self-repair method thereof, which belong to the field of battery fault repair. The lithium battery system includes a bidirectional DC-DC converter, a supercapacitor group, a processor, a battery detection module, and multiple A battery pack composed of lithium batteries and multiple switches. The super capacitor pack is used to provide power for the bidirectional DC-DC converter; the battery detection module is used to detect the status data of each lithium battery in the battery pack; the status data is fault or Normal; when the status data is faulty, the processor controls the on and off of multiple switches in the battery pack to make the bidirectional DC-DC converter replace the faulty lithium battery. When a faulty lithium battery occurs in the system, the external power supply of the system is abnormal, and the self-repair function refers to that the system can automatically repair the abnormal external power supply. The present invention replaces the faulty lithium battery with a bidirectional DC-DC converter after detecting the faulty lithium battery, so that the system The external power supply returns to normal, with self-repair function.

Description

technical field [0001] The invention belongs to the field of battery fault repair, and more specifically relates to a lithium battery system with a self-repair function and a self-repair method thereof. Background technique [0002] As a clean and energy-saving new type of transportation, electric vehicles have been valued by governments, academia, and industry around the world. They have no pollution or lower emissions than traditional vehicles during driving, and are less noisy, energy-saving and environmentally friendly. [0003] Lithium battery systems are commonly used in electric vehicles. In general, lithium battery systems connect battery cells directly in series, and each series node is led out by a wire to measure the voltage of each cell. Deficiencies of general lithium battery systems: 1. When a battery cell in the battery pack fails, its electrical characteristics change, causing unpredictable fluctuations in the output voltage of the entire battery pack. 2. Af...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/42H01M10/44H02J7/00H02J7/34
CPCH01M10/42H01M10/4285H01M10/441H02J7/345H02J2207/20Y02E60/10
Inventor 耿晓虎王黄胤李奥博罗徐佳沈越黄云辉
Owner HUAZHONG UNIV OF SCI & TECH
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