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Lithium battery system with self-repair function and self-repair method thereof

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

Active Publication Date: 2019-08-02
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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  • Lithium battery system with self-repair function and self-repair method thereof

Examples

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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 the self-repair function and a self-repair method thereof and belongs to the battery fault repairing field. The system includes a bidirectional DC / DC converter, a super capacitor bank, a processor, a battery detection module and a battery pack composed of multiple lithium batteries and multiple switches, wherein the super capacitor bank is usedfor providing power for the bidirectional DC / DC converter, the battery detection module is used for detecting status data of each lithium battery in the battery pack, the status data is faulty or normal, when the status data is faulty, the faulty lithium battery is replaced by the bidirectional DC / DC converter by controlling turn-on and turn-off of the multiple switches in the battery pack by theprocessor. The system is advantaged in that when a lithium battery fault occurs in the system, the external power supply of the system is abnormal, the self-repair function is for self-repairing external power supply abnormality of the system, after detecting the faulty lithium battery, the faulty lithium battery is replaced by the bidirectional DC / DC converter, so that the external power supplyof the system returns to normal, and the self-repair feature is achieved.

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 Applications(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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