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Universal type lithium battery wireless charging system

A lithium battery, a general-purpose technology, applied in the electrical field, can solve the problems of battery overcharge and overdischarge, battery damage, affecting the normal service life of the battery, etc., to achieve the effect of improving accuracy and improving charging safety

Inactive Publication Date: 2018-11-23
BEIHANG UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims at lithium-ion batteries in the process of charging and discharging, too high or too low voltage and current will cause serious overcharge and overdischarge phenomena in the battery, and excessive temperature will cause severe chemical reactions inside the battery, causing irreversible damage to the battery itself. damage, thus affecting the normal service life of the battery, a general wireless charging system for lithium batteries is proposed

Method used

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  • Universal type lithium battery wireless charging system
  • Universal type lithium battery wireless charging system
  • Universal type lithium battery wireless charging system

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Embodiment Construction

[0028] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0029] The present invention provides a general-purpose lithium battery wireless charging system, the structural block diagram of the system is as follows figure 1 As shown, it includes: a primary side device and a secondary side device, the primary side device provides energy for the secondary side device, the primary side device includes a power supply 1, a primary side circuit protection module 2, a primary side voltage module 3, and a primary side current module 6 And primary side temperature module (not shown in the figure), also includes inverter circuit and voltage conversion module 4, current RMS acquisition module 5, primary side control module 7, primary side communication device 8 and primary side coil 9, secondary side device Including secondary coil 10, protection and energy release module 11, lithium battery 12, temperature acq...

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Abstract

The invention discloses a universal type lithium battery wireless charging system. A secondary side device comprises a lithium battery, a voltage acquisition module, a current acquisition module and asecondary side control module; the secondary side control module acquires voltage information and current information which are respectively acquired through the voltage acquisition module and the current acquisition module, compares the voltage information and the current information with a set voltage threshold value and a set current threshold value respectively to judge whether the lithium battery is abnormal or not, sends a lithium battery abnormality instruction to end the charging of the lithium battery when the voltage information or the current information exceeds the voltage threshold value or the current threshold value; and when the voltage information or the current information does not exceed the voltage threshold value or the current threshold value, the secondary side control module compares and judges the voltage information with an upper limit voltage of a preset voltage range of a charging stage of each mode, controls a corresponding charging mode to be turned on according to a judgment result, and ends the charging of the lithium battery according to a preset ending condition of the charging mode. The universal type lithium battery wireless charging system disclosed by the invention realizes automatic control of each mode of wireless charging and also improves the charging efficiency of the lithium battery.

Description

technical field [0001] The invention relates to the electrical field, in particular to a general-purpose lithium battery wireless charging system. Background technique [0002] Lithium-ion power batteries are widely used in electric vehicles as energy storage and supply devices because of their significant advantages such as large cell voltage, specific energy, long cycle life, and low pollution. During the charging process of a lithium battery, the charging terminal voltage and the battery capacity have a nonlinear positive correlation. During the charging process, the terminal voltage of the lithium-ion battery can be fully used to estimate the capacity state of the battery, and then the charging method can be adjusted in real time to make it fast charging. According to the battery voltage from low to high, the whole charging process can be divided into three charging states: trickle charging, constant current charging and constant voltage charging. The trickle charging ...

Claims

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Application Information

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IPC IPC(8): H02J7/00
CPCH02J7/0029H02J7/007H02J7/025H02J7/027
Inventor 杨世春何红闫啸宇杨鹏崔海港
Owner BEIHANG UNIV
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